I did a bit of research to see what kind of scores one finds posted around. It is absolutely without question that MnK has a distinct advantage in this exercise.
It looks like the highest score claimed is perhaps 148. Timmy topped out at 134. Controller highest scores seem to be around 120ish. I saw a claim that Verhulst's top was 112. I watched Jankz on stream the day that SOA debuted, and I think he got around 110, after some work. After this cursory research, I'm going to estimate that MnK has about a 15% scoring advantage, at least WRT skill ceiling. I saw some complaints of people using Cronus or xim, but given that the targets do not have aim assist, the only thing that brings into question is whether some reported "controller" scores may have been really done on MnK. Here's a couple sources with some "regular folks" reporting their scores:
https://www.reddit.com/r/apexlegends/comments/tzmdfh/whats_everyones_highest_score_in_scout_of_action/
https://twitter.com/playapex/status/1509678180084457477
I think for the sake of fairness we sort of do have to have two categories here for controller vs. MnK, and I would love to see some more scores from our PC friends. But I'm happy to bow to @EA_QueenBee for the time being! I mean just look at your name, presence of royalty and all that... If you're not that experienced with controller (you didn't mention), it may take you some time to get near our scores, but who knows?? Some people take right to the sticks.
I feel that if I continue to grind on this, I may eventually break 90. But that would really take some time, the returns are diminishing. I'm usually lucky to get near 80 on any given day. I'm not in the least bored of grinding this. it's a fun self-challenge and I know that it has to be improving my target switching/flick aim. I can certainly can feel a big difference after about ten minutes every time. So at the very least, i view it as a great daily warmup. Not having access to tools like Kovaaks, we on console have limited ways to improve out aim outside game.
A separate discussion could be held here to vote on who has the best looking G7 skin/charm combo...