I would want to play some casual games like gmod, league of legends, falloutnew vegas, minecraft etc etc http://mobile.walmart.com/...ype=search Or http://touch.groupon.com/deals/gg-hp-elitebook-8440p-141-notebook-with-intel-core-i7-dual-core-processor-and-windows-7-professional
Which laptop wolde be better for gaming?
It's the Graphic Card that makes your best gaming laptop live
As the first response said, the main item to worry about is the graphics system. In this case, Neither is going to be great, as they both are borrowing main system RAM, rather than having their own GDDR3 or GDDR5 RAM, which are much faster types of RAM.
Overall, though, the one at Wal-Mart would be better. A bigger screen that can go to a higher resolution, Double the RAM (though that extra is dedicated to the GPU, the other system has to borrow some RAM for the GPU as well), a more reasonable hard drive space, and a CPU that will probably outperform the other on any properly multi-threaded apps. I wouldn't recommend the one from GroupOn to pretty much anyone.
For gaming, you'd be better off getting a laptop with it's on Graphics RAM, but for a model like that, you'd likely end up paying double what either of these cost, because of all the other bells and whistles that would be there as well.