Phoronix compares GNU Hurd against Linux, you can check it out over here.
Last week there was a GNU Hurd status update, which generated
a fair amount of attention as it stated there are plans for a Debian
GNU/Hurd release in conjunction with Debian "Wheezy" when it's out in
late 2012 or early 2013. After being in development for more than 20
years, the Hurd is finally taking some shape. The Debian GNU/Hurd
installer for Wheezy is even now working, which I tried out and ended up
porting the Phoronix Test Suite to GNU Hurd. In this article is a brief
look at Debian GNU/Hurd along with the first-ever benchmarks of Debian
GNU/Hurd against Debian GNU/Linux.