Hello,
MSI B450M Mortar MAX
MSI B450 A-PRO MAX
MSI X470 Gaming PRO MAX
All of them cost the same, I don't know anything about VRMs, but from what I read the Mortar MAX and A-PRO MAX should have the same VRM? The A-PRO possibly slightly worse cooling of them.
I can't find any comparison with the X470 Gaming PRO.
There is also B450 Tomahawk MAX, but it's the most expensive one and from what I read it's just better looking A-PRO with slightly better VRM heatsink.
MSI B450M Mortar MAX
MSI B450 A-PRO MAX
MSI X470 Gaming PRO MAX
All of them cost the same, I don't know anything about VRMs, but from what I read the Mortar MAX and A-PRO MAX should have the same VRM? The A-PRO possibly slightly worse cooling of them.
I can't find any comparison with the X470 Gaming PRO.
There is also B450 Tomahawk MAX, but it's the most expensive one and from what I read it's just better looking A-PRO with slightly better VRM heatsink.