I believe I can comment objectively owning two of the models you mentioned.
While I was lukewarm when Ducati went to water cooled, the newer 1200's do have more of a bad-ass look to them but the air cooled were more esthetically balanced from left to right.
As for the 959 Panigale, it's drop-dead gorgeous Period...and that's from any direction you happen to be looking at it. P.S. I have the stunning North-American version.