I'm just curious if the grips are different sizes between the heroes, or if they are the same, and the gap between them and the clamp is because the bottom half isn't pushed all the way up.
I don't think they're the same; based on the square clamp holes, you can see that in all cases the bottom is pushed in all the way. And if the grips would have the same length and moved the end of the bottom piece, the gap at the clamp side would be a lot bigger. So I think the length is different between all hero versions.
Yeah I really wonder how much these grip distance to the clamp can be explained by the tube shifting.
If the tubes are in the furthest position, you can tell from the holes in the clamp. That's nowhere to be seen.