The ASRock X870E Taichi and the ASRock Z890 Taichi result in an objective tie, as both motherboards secure an equal number of specification wins across the evaluated categories. The most impactful advantage for the ASRock X870E Taichi is its PCIe x1 slot configuration, which offers a 100% improvement over the alternative. Conversely, the ASRock Z890 Taichi provides a significant edge in connectivity, featuring a 50% advantage in USB Type-C port availability compared to its counterpart.

Users prioritizing expansion capabilities for add-in cards should select the ASRock X870E Taichi to leverage its superior PCIe x1 slot count. Those who require extensive high-speed peripheral connectivity should opt for the ASRock Z890 Taichi to utilize its increased USB Type-C capacity. Because both boards share identical performance in the remaining eight categories, the final decision rests entirely on whether your specific build requires more internal expansion slots or additional external port options.