I got the samples today. Both are very similar when it comes to cutting. The green mat (magic mat) is slightly better-some cuts were not as complete on the rhino mat (which is white and doesn't come with the grid printed on it except in a really big and expensive size) and I had to cut through twice for them. The grid is important to me and since the magic mat is a little better, I think that's what I'll go with. It costs more though and I'll be honest-I like the look of the white one better. But the looks are probably the least of what I should be worried about. The speedpress site (the company that makes them) is the cheapest and they cut within 1/4". I think that should be close enough for me.