It's a good question, but it's very difficult to compare like with like.
Leaving out chamber shrouding, the rod ratios will be different. If the head flow is sufficient, the diff may be small but if the head is too small the shorter stroke wins.
They're going to need slightly different cams, and which one makes more power may just be "which cam came closest to what the motor wants".
The dome shape will be slightly diff for the same static CR, and since the dome is the "floor" of the chamber some minor diffs are expected.