Dr Love said:
You have a metric for adjusted scoring from year to year? I'd like to see that.
There are actually several in existence. I've created one on my site, Daryl Shilling has one on his excellent website, and there are adjusted scoring metrics in "Total NHL" by Dan Diamond and "The Hockey Compendium" by Jeff Z Klein and Karl Eric-Reif.
Based on my system:
Bobby Clarke: 1,185 games, 324 goals, 743 assists, 1066 points, .90 pts/gp
Henri Richard: 1,417 games, 395 goals, 729 assists, 1123 points, .79 pts/gp
Clarke's peak value is 99.1 pts, Richard's peak value is 84.5 pts.
So based on offense alone, Richard scored slightly more points in his career due to longevity, but Clarke was better in his prime, and better per-game.