Here's a head-to-head video ft. the Tab and the iPad.
http://www.youtube.com/watch?v=LYivabHHj9g

What's interesting is that the reviewer is an iPad owner and advocate and in his analysis, gives the Tab the slight edge. Of course, the test is a little to shallow to be conclusive, but on the surface the two seem quite evenly matched to an objective peruser.

Now... Where's my GPU accelerated browser?!