I also own, Nokia 3200 and is quite a good phone. It provides value for money with 4096 colored 128x128 display, speaker phone, torch, fm radio, infrared, organizer, voice recording & playback of AMR audio that can be used as ring-tones, changeable covers, EDGE (e-gprs) upto 44 kbps and loads of so many other features.
The only shortcomings of this phone are
(1) It does not feature a modem
(2) only 1.1 mb of memory
In terms of technical comparison, this phone superior that 6610i, with support for HSCSD which 6610i does not have. But 6610i has more memory and modem support. The Nokia 3200 is featuring trendy and sporty looks and is aimed at youngsters who look for more things at a lower price point. While 6610i is business like looks phone.
These are the TWO important features available in 6610i not available in 3200 which makes it come at good price point.
This the way Nokia has pitched the two product which are