If you have to draft someone to for the next 10 years i'd pick KG. He was consistent, always in shape (anorexic i guess, but strong) and he could be the centerpiece on any type of team.
Bark was a guard mixed with a center. Had the agility, speed and ballhandling of a guard and the strength and ferocity of the best centers.
His offensive game was unstoppable. Plain and simple, he was a beast. He was helluva lot more exciting to watch also.
They really are a tough two to compare. Bark may not have played defense but his crazy rebounding and style of play inspired his teammates more I would think. KG in his MVP season though was an insane beast as well and did everything. I think in a head to head matchup Bark would put the hurting on Garnett so I'll give him the edge. KG actually has the better matchup but doesn't have that killer go at him every play and try to embarrass him attitude Bark has.