Here is a quote from Wayne DeMilia when he answers a question whether Ronnie is the greatest of all time.Source: Muscular Development December 2005:
"I couldn't answer that with a yes or no for the same reason I couldn't tell you whether Barry Bonds is better than Babe Ruth or vice a versa.It's different eras.It's different times,which means different training,different nutrition,different supplementation etc.To me Ronnie is the best in his era,just like Lee Haney was in his and Arnold before him.That's the only way you could look at it....It makes you wonder if Haney had access to all the nutritional knowledge that Ronnie has today,would he have been even better?THE SAME GOES FOR ARNOLD,WHO WAS ACTUALLY A PHYSICALLY BIGGER MAN THAN EITHER LEE OR RONNIE.HE WAS TALLER AND WIDER."(End of quote)
We know that Wayne was a IFBB chairman for many years so obviously he's seen them many times in person and next to each other.