Haney defeated Dorian due to better symmetry. By that, I mean that Haney had the better structure and proportionality. Lee clearly won the symmetry round due to his wasp-waist and wide clavicles. I have said time and time again that Haney is an underrated bodybuilder. He is, arguably, the only bodybuilder who could do a vacuum pose at 250 lbs and had no muscle missing.
As far as muscularity, I think it was much closer than the judges ruled. It's obvious that Haney's delts and pecs were thicker than Dorian's, and while they had equivalent backs in terms of size, Haney's was more separated. The only bodypart, I think, that Dorian soundly defeated Haney was in legs, both quads and calves. Here is what Dorian had to say about his confrontation with Haney:
"At the time, I feel that Lee's posing and presentation were much better than mine. Physically, his pecs were thicker and his back probably better. It's a shame that he retired, because I would ahve loved a re-match." Interview to Bill Dobbins, FLEX, 1997.
SUCKMYMUSCLE