As stated by
Elysian, because a material change to your contract, you will be able to leave Sprint sans the ETF. I will first state that I'm Android bias, as the Droid is my 3rd Android device. However, here are some advantages the Droid has over the Pre that I'm aware of.
1. Screen size and res. Its the most obvious difference between both phones.
2. Battery life is far superior
3. The Pre, like many other HTC devices I own have a tendency to get hot during usage, I have yet to experience this on my Droid
4. Its made with much better materials, metal instead of glossy plastic
5. IMO, better Facebook integration. You can associate as much information as you choose where as the Pre is just all or nothing.
6. Speaker that manages to sound "stereo" at loud levels, the Pre's speaker sounded "tiny" to me
7. More layers for Google Maps, including street view and turn by turn navigation
8. Threaded Gmail
9. Browser that doesn't have to redraw constantly when scrolling
9. MUCH faster performance. The Pre is just painfully slow at almost everything. I don't know about you, but I remember not even really wanting to use the majority of my phone functions because I felt I was always waiting, waiting, waiting..
Also, from an OS standpoint, I like the idea that I can not only download alternatives to pre installed applications, but tell my OS that I want to default access to said alternatives. I can download files, browse, unzip, even create a ringtone directly from my device without the aid of a desktop. When I want to go back a page, I simply hit the back button. That may not look as cool as swiping on a gesture menu, but its simple, and effective. I don't think I even need to go into the homescreen customization and so forth. Basically, Android just excels at being useful. The Pre just excels at looking elegant, with usefulness being a sidebar.