Just thought I'd post up a screenie comparing the two, feel free to post up any others. The images are blown up to show what AA does to smooth down the edges since people were complaining it did nothing, but kill FPS.
http://img513.imageshack.us/img513/5312/differencebetweenx1andx.png
Not a huge jump in quality, but it does look nicer at x16. Does it affect the FPS much or does it still run well w/ a decent machine?
Am interested to test myself, but I can't get into town atm.