Neither one is standing straight up in the MM, so it's difficult to judge their height. They look to be about the same height in all the pics you posted to me. How tall is KL? Ronnie? Aren't they both around 5'10? Here's another MM comparison of he and RC. Both have great arms.
based on the pics from 98/99 it looks like Levrone's arms might have been a bit larger.
the difference of course, though in quality was signficant.
ronnie's arms absolutely blew kevin's off the map:
Kevin's were so puffy and smooth by that point they looked terrible in comparison: