wwhy do you compare to pro/XsX ? it's not relevant in this case since we are comparing at release of these games, thus BF4 was not enhanced for midgen refreshes, or should we wait for eventual PS5 Pro/ XsXXX ?
we are guessing anyway, you can't tell for sure, i can't either, only devs could.
and why map size would be more important ? would'nt they just reduced map size because of player count instead ? we've seen larger maps on PS3 in a lot of games, but a bigger map with only 24 players would be very frustrating.