I'd say w760i would be better, even though I like the looks of the w910i way more!

some things to keep in mind...

-US 3G and 3.5g
-3.2 mp camera

-no gps
-no US 3G
-2 mp camera

both phones have the accelerometer and all the shake control stuff

here's a comparison on the UK site, the phones are the same, and I added my phone, the k850i, just for kicks. (love it by the way!)