Best link for side by side comparison spec wise:

Verizon Droid Incredible vs. Sprint Evo 4G vs. Google Nexus One -- Spec fight! | Android Central


Then after looking at that you should look at the cost per month. Sprint plans are less overall.

 

Also look at coverage

 

Evo has a couple of slightly higher specs, LCD versus AMOLED, the option of connecting to a Wimax network where available, and cheaper plans.

Obviously check coverage in your area on Sprint and Verizon's site. If coverage is good for both, Sprint costs less. If you get good Verizon coverage and poor Sprint coverage, no amount of savings will make up for that.

My general rule of thumb is to check coverage first, then out of the carriers that cover your area, look at plan price second (don't get fooled by base price when data, text, nav, etc. cost more to add on), and once you figure out who has good coverage and cheapest plans, choose your handset.

 

The EVO also has a front-facing camera, HDMI out, and a larger screen.

 

Both are going to be great choices, like Neodorian said, it really comes down to coverage

 

You can't technically turn off Sense on any phone. You can use an alternative home launcher by default with the EVO is what you mean.