Both mobiles have almost same features K750i has better battery life and a camera lens cover. W750i is way better. The "W" series are the best. U don't need any lens cover, I don't have any n my lens isn't scratched. w750i has the better software also, I'm not talkin only about the Walkman software (which is great innovation btw ), I'm talkin about the life of the software. I have many friends with k750i who are complaining from it. I use w810i n I don't think I will change it soon. N if I do I'll change it for another Sony Ericsson Walkman phone. err theres no such thing as the W750i!
The K750i is a newer phone with a better camera on it but not as powerful as the W700i me thinks, but that was more orientated to the Walkman. Lots of pro's and con's.
Personally i would stick with the 'W' series but then ive got a nokia. lol
http://www.sonyericsson.com/spg.jsp?cc=g... | 