Well, this is the exact same argument about Tatis, Jr.
I think it's fair to say between Buxton/Correa and Robert/Moncada...whichever grouping plays the most and puts up the most fWAR for the the remainder of the season is going a long way towards deciding the eventual fate of the division.
Buxton has already earned his $10 million for this season at 1.6 fWAR.
(Time will tell if Carlos Rodon, likewise, will earn his $22 million if he can't finish the season out for whatever reason.)