I just get My nokia 6200 from Att-USA

Some one help me let me know the Nokia 6200 is good phone, I got 3 more day left exchange orther phone.

Nokia 6200 is DTC3 Or DTC4 ?

What is DTC3 and DTC4 ?
Which one is better.

Sorry this is first time I am using Nokia phone, anh first time post question in this forum.

Thank you for you help.