I think Mistico's all right...he'll probably end up being the most significant cruiserweight since Mysterio, Jr., if he can get a significant run somewhere in America (i.e., a run of at least a year, not an appearance or two).
But, until he gets that run, he can't compete with Steamboat. However, if this match took place again down the road, in two or three years time, I think it would be up in the air, as Steamboat's legacy, although great, is definitely surmountable.
Pick: Steamboat