I too am a Ghandi's veteran and found Roti Time to be a little disappointing. It's very hard for me to say that... I mean the food was great... it's just that once you've had the original Gandhi's, it's hard to hold a candle to them so to speak.
The innards were "pastier" than Gandhi's, not as rich and tangy as I'm used to. Also, I found the roti shell to be overcooked and dry, not pliable and moist as it is at the parent location.
I'll still go back to get my weekend roti fix.