@ tomaaron872: Good question. This page provides some useful information about 12 vs. 13/14: Truedepth Camera on iPhone13 products - lower accuracy of depth data?.
Rumors suggest iPhone 15 will be released soon. Purportedly, it will include a 48 MP TrueDepth camera resolution. Not sure what increased resolution / sensor quality differences will mean for overall results with Metahuman Animator. 4x resolution sounds awesome, but if the sensor is of a lower quality, compared to 12, the increased resolution might not offer improved MA results.