Eris vs Imagio

[battlemac]

So, I am looking to get a new phone in the coming month and it has come down to the Eris and the Imagio. Both of which are going for 100(at least from what I see in the commercials), so price is not a factor.
What is a factor to me is the screen(everything about the screen except for screen size, which isn't a factor), on screen keyboard, and responsiveness of the screen? Which has the better call quality, audio/speaker quality, durability, and battery life? Which one of these is better/averaged out better in these categories? In the end which will be the faster, more enjoyable device?

I understand OS plays a factors, but I am really open to both OSes. I have a WM 6.1 Samsung i760 right now so I am fine with WM, but Android is the new kid on the block and kind of interested in trying it out. Most of the software I use on WM aren't too key besides Office Mobile and Opera Mobile/Mini which should have suitable replacements for on Android. But, I do like how WM is kind of like a full OS in usage/feel(i.e. registry and stuff of that sort). Does Android offer a similar feel? I wasn't that fond of TF3D but that Sense interface the HD2 has does make it look more pleasurable. So, how does the Droid Sense UI compare?

My upgrade date is about a 2 weeks away and the HTC Dragon comes out in a few weeks. I hear it should be going for $150, any one think I should wait and see what that brings and go for it?

Thank you.