If playing at 1366 x 768 resolution is what you want then I say laptop. The desktop video card is lacking the power on fps games, even at 1366x768.
I mean games are, I think, most enjoyable at a larger resolution, say 1080p or higher, but that then depends on your video card.
But for the money you are dishing out at $740 for that laptop, I bet you can build a much stronger desktop.
You didn't mention your budget, so it depends on how much you are willing to spend.