I live in Serbia.I dont have in shop ASROCK EXTREME 4 but i have ASROCK Z390 TAICHI in shop is same price as asus rog strix z390 e gaming and litle higher AORUS ULTRADo you live in US? How much is ASROCK EXTREME 4? That will be my choice.
VRM tier list:
https://www.overclock.net/forum/27657582-post2156.html#/topics/1638955?page=216&gid=1&pid=1