There is no good or bad. These are two different technologies and the only difference I find is that CDMA would give you better reception behind thick walls but apart from that it is more or less the same for an end user.
I am too using Reliance gsm and cdma phones.........in my case cdma performs better. i never face any rang problem with CDMA phone but in the case of gsm when u travel it have very bad signals rang. rang come and drop, come and drop all the time.
Personally i feel CDMA phone is bit more safe then GSM.
If you short listed any CDMA Phone go for it.