The GTX260m is roughly 20% more powerful in terms of pure processing power, and up to around 40% in certain games, which is somewhat significant if you ask me.
Dx10.1 doesn't perform that great for games that support Dx11 like BC2, though, and you'll have to force the game to run on Dx10 :P
The HD5650 will get you 30fps in BC2 on average; the GTX260m will get you around 40. Pick your poison.






