k750i does have small screen size compared with n6630.
also, n6630 has EDGE. better for internet connection.
but n6630 IS prone to viruses.... lots of viruses for symbian. i'm not sure but, IMO about 50% of the symbian phones are infected. no FM is the big minus in n6630.
following things are missing in k750i compared with n6630
- real media support
- EDGE
- designer covers
- symbian os
k750i beats n6630 in these
+ camera quality
+ built-in flash come torch
+ music quality
+ fm radio
+ elegant UI
+ ease of use
+ phone design
+ size & shape
+ virus security
+ joy-stick (like never before)
k750i is a total entertainment unit & pride of the owner!
but u should always go by your needs and not just the ratings...