My best friend has had them all, and he dumped them to go back to the Droid.
They pretty much can do the same, droid has better camera with led, 2.0 isn't that big a deal, we'll get it too. Droid can root easily.
The async voice/data is huge, that is why he dumped it originally and tried the rest. He still went back to the droid basically because he is living in the woods and didn't have 3g with other networks.
I think the real reason he went back to the droid is because of HD screen and video, the processor and the steel case.
We're basically all 'droidheads'.
Personally I hate the droid, too heavy, hate sliders and IMO that device is not as sexy as my Merlot Mytouch.