Verified answer

Anderson Sliva. Even though Royce is the God of Submissions and the Ground overall but Anderson has adapted to everything and every position possible , he also has better stand up game. Anderson would win also because of his evolution through mma he knows the new and the old ...

Anderson Silva, simply because he would be the more complete fighter, back in the day it was pretty much style against style and not a lot fighter were familiar with BJJ style. Now, MMA has evolved so much that guys are so well rounded, heck I would even dare to say that BJ Pen would win against Royce, but respect to the old school and pioneer of the sport.

silva easily. Like mention above it was style vs style. But if you look at the champions of ufc and progression its not bjj masters at the top.

Hw-Jds=Primary boxer/ko artist

Lhw-JBJ=Round fighter/athletic

mw-Anderson silva- Dangerous precise striker with solid ground game

ww-Gsp= Very round fighter/athletic/smart

lw-Ben Henderson=Round fighter/big fast athlete with lots of cardio and heart.

Anderson Silva.

i totally agree with Roberto, Anderson is MMA style era and Gracie is more of a "my discipline" vs. "your discipline" style... even though i consider Royce as the greatest UFC fighter ever.. Anderson will have an easy victory on this one