It's a hard one tbh. I would pick Marquez and i'll tell you why.
Rafa is messing up because he's making mistakes. Once he gets back to full fitness and becomes sharper to match situations, he'll be able to iron out these mistakes and with his experience he should be able to do this in the very near future.
Chygg is just natuarally slow. It's not a fitness/sharpness issue. It's more his physical limitation.
Right now, i'd choose Rafa but Chygg can improve and will do with more experience in his positional awareness which will kind of compensate for his lack of speed.