According to my foresight from a year ago, Tegra2 exceeds Intel Atom (base N450) and I think it would narrowly lose to a dualcore 1.7GHz Atom (N570) when the Nvidia T20 is in 1.0GHz.
I'll leave it up to you decided how it rockets when overclocked.
http://talk.maemo.org/showthread.php?t=68882&page=4

Now the question is: Can it play Crysis?

edit:

I just realized a few things. Nvidia has codenamed the Tegra-SoC's Wayne, Logan, Stark is inline with Batman, Wolverine and Iron Man ... but I never knew what Kal-El meant.

Well I realized Kal-El is Superman, so the name-game is quite funny. And "x100 performance increase" over the T20 SoC is mind-boggling @_@ What's next "Nvidia Vegetto"?

But then I saw Nvidia's own benchmark which put Kal-El only 10% faster (CoreMark= 11,400/10,100) than Intel T7200. Now I don't want to burst anyone's bubble but the Intel Core i7-2657M is very power effecient and manages to surpass the T7200 Core 2 Duo by a 45% (3D06= 2500/1700) performance increase.

So Intel is actually in the lead, over ARM, for powerful and efficient cores @_@

http://trend-web.blogspot.com/2011/0...by-nvidia.html
http://www.notebookcheck.net/Intel-C...r.37073.0.html
http://www.notebookcheck.net/Intel-C...r.49737.0.html