@krazzy sorry but you are the one in need of ground check here.
http://www.gsmarena.com/sony_ericsson_k850-2003.php
That clearly states there is no WiFi in K850i
http://www.gsmarena.com/nokia_n82-2177.php
and this one states that nokia N82 does.
And if you mean that was the only difference comment,I based that on performance of the music player and the camera of both. I have used both of them. And TV out feature just sounds very cool I dont find it that cool.
And specially looks wise K850i exceeds N82, I personally find it a bit ugly compared to other nokia phones.
Both of them now cost nearly same, so I guess it depends on you Shreejith as to which one do you want.