Uh. Helenius has the potential to be better than Povetkin. But right now, Povetkin would kick Helenius's ass, even after getting messed up by Uncle Teddy.
I didn't think too highly of Helenius until the Levin fight but I had to change my opinion somewhat. Povetkin appears to be fighting at 60-70% of his performance 2-3 years ago. I think a sharp Helenius could take out a currently gun-shy and confused Povetkin with one of those short right hands.
Helenius has got some decent potential, but nobody knows how far he can get eventually. Right now Povetkin would mop the ring floor with Helenius.