Okay so personally I'm a very evenly split bisexual. And I dunno I'm a bit of an exhibitionist but I put myself in more situations where I'd probably get attention than like demand it from people.
That being said, maybe it's just word getting around or like these situations I put myself in but both matter a lot to both gay men and women. I'm a tad over 6'2 and have a dick that's a genuine near 9 inches, so I couldn't say which matters more because I thankfully have both, but I can say that both matter. Girls tend to be less open about caring about the two, especially dick size, but at least from what I've gathered it matters.
Also to me size matters in cock more than height, but really tall guys that are attractive can floor a guy, so like yeah both matter.