It just occurred to me that I've been MIA from ESB for awhile now. Its not intentional or anything. But anyway, I fully agree with you. I think its Benitez clearly. Bigger wins plus the distinction of being the youngest champ ever. I dont think McCallum's better longevity surpasses that.
Greater? Benitez. Better? Benitez. H2H? Benitez. But it's actually close in all three. And I should say that I much prefer McCallum.
I'd say Benitez was probably a better fighter during his brief peak, but they rate more comparably all-time due to McCallum's greater longevity and consistency. H2H at 154, I'd favor McCallum.
Benitez is greater, McCallum aged much better, and in a 154 lb. fight Benitez would win a close, controversial decision