I've got both lights. They aren't comparable at all. The TK11-R2 is a thrower, the U2 is an allrounder. So, the hotspot of the TK11 is much brighter, the spill is darker.
On the other hand, you can get 2 x TK11-R2 and 2 x TK10 (better comparison) for the price of a U2.
Don't compare, think of what you want to have!