As a rider, I'd s say you won't notice either, or at least you'll get used to it quick. If I had to guess, I'd say BB because HT angle is overrated.
As an engineer though, it's an interesting question... All else being equal:
1 degree HT angle changes wheelbase by about 1/4", which changes turning radius by about the same amount with the bars at 45 degrees.
HT angle also affects self-straightening due to gravity, by transferring some of your weight in the horizontal direction. There are studies, but my math says 1 degree transfers about 1.1% more weight to the horizontal, at least near the 75 degree typical angles.
BB height changes your center of gravity, which changes horizontal leverage. For example, assuming a 13" chainstay, 1/4" higher BB gives about 6.6% more leverage when pulling into a manual, or about 6.6% "more loopy" and "less stable".
They both do other stuff too, and I'm not sure the numbers mean much because any other differences in geometry would change the results at least as much, but at least it gives you something for comparison.
Remember when you could ride all day and not be sore for a week?
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