Huh interesting WildCard, cause the B450 Tomahawk is one of the best AMD motherboards on the market. Incredibly good.
Now I will mention, that I have an MSI A68HI motherboard, I really don't like it BIOS is cheap and lacks features. But I have built several rigs already with the MSI B450 Bazooka and really liked that motherboard.
OP, both boards are good, the B450 Tomahawk has superior power delivery so if you want to overclock go with that one.
But the B450-F Strix has superior software and the BIOS is easier to navigate and has some extra features. So if you want to go stock, just go with the B450-F.