is there any other restriction besides spinning back fist? I mean, MMA fighters could easily win if the tackle/takedowns are allowed. as for the triangle-shaped stage, it is far more restricting compare to an octagon or boxing ring. it could affect their strategy, especially for boxing since there are a lot of boxers taking advantage of the space they have on the boxing ring as part of their strategy and with this far smaller as restricting fighting stage, that strategy can be affected.

you should take a look at their fighting styles. as for me, I think the ones that have the most advantage here is fighters who are an expert with close-quarter fights.