no point, they are usually popularity contests anyway. Who knows how good drex/levi or anyone else of the 'old' was? Could they beat Grizz or Kazaa at their peak, who knows... their peaks will never coincide, so the top 20 is almost impossible.
Top sticks are pushing to the limits and are capable of riding those limits longer and better than the next best guy. Whether you'd put new generation back then, or old guys back here, they'd still be top sticks given about same amount of flying time.
The only difference is that old guard, for most part, has no proper motivation to do it all over again. They've been there and done that, most of them several times.
So, yeah, comparison is possible, but why?