The Grizzly 160 is one of the best broadheads available. They're tough to sharpen for a lot of people but fly great, and they're practically indestructible.
I don't have any first hand experience with the 160 gr. Wolverine but the smaller, lighter ones are famous for bending over at the base of the ferrule. The Wolverine is much easier to sharpen but, that's a non-issue if the head is prone to fail.
Hopefully someone will be along to let us know if the 160s are stronger than the 125s.
Ron