The MSI MEG Z890 ACE is the objective winner of this comparison, securing more individual specification victories than its competitor. While both boards share many identical features, the MSI MEG Z890 ACE holds a significant lead in storage expandability, offering 50% more M.2 slots than the ASRock X870E Taichi. This advantage makes it the superior choice for users who prioritize high-density internal storage configurations and require additional high-speed drive connectivity for their system builds.

Users who require extensive storage capacity should select the MSI MEG Z890 ACE to take advantage of its superior M.2 slot count. Conversely, the ASRock X870E Taichi is the better option for those who specifically need more PCIe x1 slots, as it provides a 100% advantage in that category. Choosing between these two motherboards depends entirely on whether your specific build configuration relies more heavily on additional storage drives or the specialized expansion cards supported by the extra PCIe slots.