Out of the lower poundage bows I shoot, I like the single bevel grizzlys. Suppose to help with penetration, if so I could use the help. Both are 1 1/8" width, and both are fine heads, imo.
Of the two, I have only tried the Eskimo. I can say it cuts well, flys well, is easy to sharpen, and is inexpensive to buy. Hard to beat results like that. Zwickey No-Mercy just as good as the Eskimo.
Like the old Zwickey ad says, " Stuck in tree stumps all acrosss the world!". Or something to that effect.
I killed my first deer with a bear razor head. I've also killed em with muzzy 4 blade and grizzly. I will likely kill my last deer with a razor head too. I bought several old aluminum 2016s at a flea market for $1 ea. They were tipped with old bear razor heads so I have a supply. Then again, if I'm lucky enough to get a Utah elk tag this year I may be looking at something a little wider.