My demographic studies of couples I deemed to be under age 30:
70% of couples are looksmatched (within 2 points IMO, which usually had the men a point or so lower) with overwhelmingly controlling women/oofy doof men
20% where the man is far more attractive. 2+ in looks.
10% where if the woman lost weight, they'd probably be looksmatched. It's harder to determine with post-wall women, but I had to draw the line somewhere.
1% where the woman was far more attractive... but, the 8 cases of this I saw, these were all big teddy bear types that had good facial bones under the fat, and they were guys at least as tall as me.
TL;DR Women never date down, and I proved it autistically researching couples near a college where I live.