Its close, but I think Phil could get the edge even if is a little narrower. Levrone just wasn't complete, his back severly lagged behind and his calves were too small. Both at their primes: equal conditioning, I'm not sure if Phil would be bigger, it seems so.
Now, I've read some guys post that Phil is better than prime Flex. Are you people crazy?
Prime Flex is almost unbeatable, only Ronnie and Dorian could surpass him.