Maybe they should fight and find out..........
The only fighter with a worse ground game than cup Cheik Kongo is Guillard.
I think overall they are similar in skill set and ability. But i think Guillard has a slight speed advantage and Varner has the chin and slight wrestling advantage. They both have good boxing/striking but are not great at bjj.
Varner takes it by having a better chin and having nearly equal power and boxing plus better wrestling.