And now for just a bit more confusion (and you thought you were here for clarification), the ENVY has the better of the two graphics cards (as far as futuremark is concerned), the 7690M scoring 1200 and the 630M scoring 950 in 3D Mark Graphics scores. Found herehttp://community.futuremark.com/hardware/gpu
The speed and amount of ram (as long as you have 4GB or more) isn't going to be noticable in everyday usage, gaming included. I don't think I've ever used more than 4 GB of the 16GB I have in my gaming rig (which is constantly multi-tasking). There is no real perceptable difference in ram speed that I've noted.
I don't think there is enough of a performance difference between the two processors that it should be a concern. The Ivy Bridge processors are designed to run cooler if not overclocked but that is about the extent of it.
As I said, it is a toss up...