I have a pair of Genesis 500's and Vandersteen Quatros. Both are very good at exploiting their design philosophies. The Genesis are only a hand full of speakers that their character does not change with vertical listening height plus the servo woofers are hard to beat. With the Vandersteens the time coherence is phenomenal but the adjustable head modules on the Genesis can come close with very careful alignment. Believe it or not, the bass on the Genesis reveals that there are some colorations in the Vandersteen bass but it is musical so it is mostly benign but it is there.
Both speakers are very musical with different attributes with the Genesis winning out by a margin with their dipole arrangement, ribbon tweeters and sheer impact but the Vandersteens still throw a very detailed 3D soundstage that is addictive and the bass equalization along with adjustable damping is hard to beat when tuning the speaker to the room.