Everything regarding the RAZR and Nexus is based off speculation. Take this with a grain of salt. I'm just going to compare what each phone has that "I" believe may be a con or pro. This is my opinion so don't go flaming me especially since there is no hands on on a RAZR or Nexus.
CPU:
The Bionic is slower than both the RAZR and Nexus. Both the RAZR and Nexus use the same CPU. However both are made by different companies and how they are utilized with the built in hardware will determine their real world speed. One may be faster than the other despite having the same processor. Unless you're running multiple apps you're not really going to see a difference. A dual core processor doesn't give you twice the speed. It just allows you to split the processes between 2 cores which reduces the load. A program that doesn't utilize the 2 cores isn't going to be faster vs a single core of the same speed. ICS is suppose to utilize that. Let's see what happens.
Display:
The Bionic is using a Pentile screen vs the Super AMOLED screens of the RAZR and Nexus. However it is comfirmed that the Nexus is using Pentile. Some people are already complaining about the screen yet they really don't have a hands on. While the Bionic does show pixelation and discoloration on some websites it's not something I am going to fret about. It does what it does and I am happy with it. I don't really notice it unless I am staring at it. But who stares at their phones while doing nothing? I sure don't. RAZR and Nexus has us beat for sure. Pentile has it's pluses so incorporating that with the Super AMOLED is a bonus. I doubt anyone will notice as the high res may offset the Pentile display.
Battery:
The Bionic and Nexus allow interchangebility. The RAZR doesn't. What's that mean for us? Battery pulls for those of us who tend to tweak our phones a lot or have issues. It also means that if we have a faulty battery we can easily get it replaced. For RAZR users who have battery issues will either have to deal with it outside of their warranty or exchange their phone. Motorola isn't like Apple when it comes to battery quality. I know every battery has it's defective batches but I think Motorola has a higher rate than Apple. I've already seen some post where bad battery is the culprit. Not being able to swap is going to be an issue with RAZR users.
Build Quality:
My Bionic is great. No flaw that I can see. Nothing like the iPhone but mine came with no flaws. The RAZR looks like it will be the top winner of build quality as it'll come with a Kevlar backing and Aluminum housing unlike the Nexus. However it may be more of a bling. Until we get our hands and get real world uses out of it we won't know how well it'll hold. My concern is the fact that it's thin and even having the above mentioned items may not protect it from certain users. We will find once its released.
SDCard:
The Bionic and RAZR will have external SDCard slots while the Nexus won't. This I don't see too much as a selling point for any of the phones. It's just an added bonus. For us who have the Bionic having the Internal SDCard and External SDCard is a pain for some programs. Why did they go with that naming scheme I dunno. Shoulda kept the External SDCard as SDCard instead of SDCard. Naming the Internal Memory as SDCard doesn't fit right cause your internal memory is not an SDCard in a sense. Like I said this doesn't seem like a selling point.
HDMI:
Bionic and RAZR will have HDMI out while the Nexus won't. The Bionic has webtop capabilites and I believe RAZR will too since it'll be able to work on the new Lapdock in works. This is a plus for me as I'll be able to display movies/pictures on a bigger screen. Gaming I dunno. I have used it briefly and it's great. Webtop isn't a plus for me yet as I have not used it. This may not be something everyone uses so it may be an added bonus.
Software:
Bionic and RAZR both will come with Gingerbread 2.3 while the Nexus will have Ice Cream Sandwich 4.0. No phone is out with 4.0 yet unless rooted and even then it's probably not full featured. Bionic and RAZR will see an update to 4.0 but who knows for sure when. Nexus will be the first to have it and I'm gonna be excited for it. Bionic and RAZR will mostly likely get a Blur'd version of it and I don't care for Blur. Not sure what Samsung uses. As long as I will see ICS I will be happy.
Not sure what else to go over. However I will point out that the Bionic will have everything I need while the other 2 will be missing some items. Every phone will have it's crowd but I'm a Bionic user and will remain one til my new upgrade. I am happy with my phone despite what some may consider lower features. Now let's see those ICS roms come flying in please!
CPU:
The Bionic is slower than both the RAZR and Nexus. Both the RAZR and Nexus use the same CPU. However both are made by different companies and how they are utilized with the built in hardware will determine their real world speed. One may be faster than the other despite having the same processor. Unless you're running multiple apps you're not really going to see a difference. A dual core processor doesn't give you twice the speed. It just allows you to split the processes between 2 cores which reduces the load. A program that doesn't utilize the 2 cores isn't going to be faster vs a single core of the same speed. ICS is suppose to utilize that. Let's see what happens.
Display:
The Bionic is using a Pentile screen vs the Super AMOLED screens of the RAZR and Nexus. However it is comfirmed that the Nexus is using Pentile. Some people are already complaining about the screen yet they really don't have a hands on. While the Bionic does show pixelation and discoloration on some websites it's not something I am going to fret about. It does what it does and I am happy with it. I don't really notice it unless I am staring at it. But who stares at their phones while doing nothing? I sure don't. RAZR and Nexus has us beat for sure. Pentile has it's pluses so incorporating that with the Super AMOLED is a bonus. I doubt anyone will notice as the high res may offset the Pentile display.
Battery:
The Bionic and Nexus allow interchangebility. The RAZR doesn't. What's that mean for us? Battery pulls for those of us who tend to tweak our phones a lot or have issues. It also means that if we have a faulty battery we can easily get it replaced. For RAZR users who have battery issues will either have to deal with it outside of their warranty or exchange their phone. Motorola isn't like Apple when it comes to battery quality. I know every battery has it's defective batches but I think Motorola has a higher rate than Apple. I've already seen some post where bad battery is the culprit. Not being able to swap is going to be an issue with RAZR users.
Build Quality:
My Bionic is great. No flaw that I can see. Nothing like the iPhone but mine came with no flaws. The RAZR looks like it will be the top winner of build quality as it'll come with a Kevlar backing and Aluminum housing unlike the Nexus. However it may be more of a bling. Until we get our hands and get real world uses out of it we won't know how well it'll hold. My concern is the fact that it's thin and even having the above mentioned items may not protect it from certain users. We will find once its released.
SDCard:
The Bionic and RAZR will have external SDCard slots while the Nexus won't. This I don't see too much as a selling point for any of the phones. It's just an added bonus. For us who have the Bionic having the Internal SDCard and External SDCard is a pain for some programs. Why did they go with that naming scheme I dunno. Shoulda kept the External SDCard as SDCard instead of SDCard. Naming the Internal Memory as SDCard doesn't fit right cause your internal memory is not an SDCard in a sense. Like I said this doesn't seem like a selling point.
HDMI:
Bionic and RAZR will have HDMI out while the Nexus won't. The Bionic has webtop capabilites and I believe RAZR will too since it'll be able to work on the new Lapdock in works. This is a plus for me as I'll be able to display movies/pictures on a bigger screen. Gaming I dunno. I have used it briefly and it's great. Webtop isn't a plus for me yet as I have not used it. This may not be something everyone uses so it may be an added bonus.
Software:
Bionic and RAZR both will come with Gingerbread 2.3 while the Nexus will have Ice Cream Sandwich 4.0. No phone is out with 4.0 yet unless rooted and even then it's probably not full featured. Bionic and RAZR will see an update to 4.0 but who knows for sure when. Nexus will be the first to have it and I'm gonna be excited for it. Bionic and RAZR will mostly likely get a Blur'd version of it and I don't care for Blur. Not sure what Samsung uses. As long as I will see ICS I will be happy.
Not sure what else to go over. However I will point out that the Bionic will have everything I need while the other 2 will be missing some items. Every phone will have it's crowd but I'm a Bionic user and will remain one til my new upgrade. I am happy with my phone despite what some may consider lower features. Now let's see those ICS roms come flying in please!