The MSI has a much better camera, and an eSATA port. The ASUS is cheaper, and they're both very reputable companies in my eyes, I have products from both companies. ASUS motherboard, and MSI gfx card. (I love the twin frozr coolers)
If you buy the ASUS you could buy a SSD, and maybe a better peripheral camera.
I'd poke around a little more, but I've gotta get to bed, perhaps I can look around some more tomorrow.
That Y570 should do quite well. Both my wife and I are rocking Lenovo machines, and both of them are quite capable. Noting that neither of us are rocking the Y570, but instead the Z575 and W520. Either way, they stay cool, and are built well.