Your looking for empirical evidence that you’ll never get. I’ve shot x10s since 1997. I change from
ACE 32” 400s because the arrow drift on the
ACE was terrible (for me) in light to medium wind. I changed from Beman Diva S to ACE due to longevity issues.
The year I changed I shot a 302 90m in a wind that had 1300+ archers struggling to break 275. I wasn’t even aiming off more that edge of yellow.
The reason the x10 is worth so much is how it behaves in medium to light wind. That alone is worth the price IMHO. Which doesn’t mean someone shooting an arrow that drifts further but reads the wind better doesn’t have just as good setup.
There is a scale of bow weight vs arrow length vs archer ability on where you start to get the value. If you are shooting sub 300 at 70m them probably not. If you are shooting sub 310 with less that 29” arrow them probably not. The longer your arrow the more benefit you’ll see.
Of course if you can afford it and it gives you confidence to have “the best” then you’ll shoot better with x10 at any draw length/weight/level.
I have never been entirely convinced about the tapered rear end absorbing poor releases. Of the shafts I have shot the Bemans were the easiest to shoot but that might be fond remembrance of events that happened a bit different. 29 years is a long time ago
In still conditions an x7/ACC etc will score just as well if you can make the distance.
2p
Stretch