Tyrannosaurus vs Dacentrurus

Tyrannosaurus is pretty much the gold standard for theropods. It's only natural for new giant theropods to be compared to it. The largest specimen measures 41 feet, slightly bigger than Sue, and is called UCMP 118742. It was originally thought to be a "super rex" over 50 feet but it was drastically oversized in estimates. Then we have dacentrurus. The biggest stegosaur, an animal covered in spikes over 4 feet long. The largest confirmed specimen measures 35-36 feet long but alleged specimens measure 40 feet. It was super deadly with its ability to pivot quickly and swing its super deadly spiked tail with amazing power. So who would win? The carnivore with a super powerful bite of 6 tons psi or the herbivore with the 4 foot spikes that could puncture bone? Here's the size comparison of maximum sizes (41 foot T-rex, 36 foot dacentrurus) [img]http://imageshack.us/photo/my-images/811/tyrannosaurusvstego2.jpg/[/img] If tyrannosaurus, how often would it win? If dacentrurus, how often would it win?