Mainboard
Mainboard
Consider which model fits your needs better. The MSI B450M Mortar Max offers more VRMs compared to the MSI B450 Tomahawk Max. Since you're planning to use it with a 3600Hz clock speed and value is around $24 more, prioritize the VRM count if that's your main concern. Your reviewer from Gamer Nexus favored the Mortar Max for its similar features at a lower price.
They likely share the same VRM design, which means the differences won’t be significant. Your choice depends on whether you prefer the design and options of one model versus another, or if you want the additional expansion ports in full ATX compared to micro-ATX.