I want to buy a laptop which one of these two are better for gaming?

Take a look at these rankings:
http://blog.laptopmag.com/best-worst-laptop-brands-2014/3

Since you want to have it for gaming, I suggest that you look at the Lenovo IdeaPad Y510p. Among other things it has dual GT 755M GPUs set up in SLI. You might be able to find a refurb in the same price with better performance, but you'd have to look hard. For a new machine it can't be beat that I have been able to find.

Yuck no good intel graphics are terrible try this computer

HP Envy dv6-7210us

Make sure its the exact model number if you buy it there are many variations of this laptop!

Neither would be very good for gaming. Both of those notebook models have intel HD integrated graphics which is not good for PC games. Look for a notebook with a dedicated AMD or Nvidia GPU or an AMD APU based system.

Their both the same really.