I helped him installing Subway Surfer and Wipeout on his Samsung Grand and while playing those games it was lagging like hell. I have played the Subway Surfer and Wipeout on my frnd's Canvas 2 and it was working without any lag.
Also while scrolling pages on Grand it was sluggish.
I don't think there is any dual SIM phone that has 3G+3G config in the indian market right now. Almost all of them are 3G SIM 1 and Edge(2G) in SIM 2.
Not sure mate if you're saying about parallel 3G+3G in both SIMs. But in my galaxy Y duos, I can use 3G in both SIMs, of course not parallely as you can use data of one only SIM at a time. But you can use 3G in both, no need to switch SIMs.
EDIT: It seems I misunderstood you. Whatever I said, was just about data, not network. And regarding later, you're correct.
Do you feel GSM Arena is in error and they would make silly mistakes such as this ?
Is there a way dislikes can be given for such useless and meaningless posts ?