Rexler because he has more options to gain his evade. To use R2 on Poe, you're effectively telegraphing your position. You've only 4 places to end up (roughly, disregarding a post-move boost).
To use x7 on Rexler, you're effectively telegraphing your position. You've only 5 places to end up (roughly, disregarding a post-move barrel roll).
I count at least 7.
