Is there some variability among panels on the base models vs. higher-end configurations (or just variation in general)? I ask because I've been using a base 13" M4 16/256 and a 13" M3 24/512 and the screen on the M3 is better. I've gone through all the color profiles, turned off true tone, and have them both side-by-side with the same settings. The M3 is just better -- not that the M4 is "bad"--it's just obviously less crisp. I was wondering if Apple sources different panels for different models. The M4 is assembled in Vietnam while the M3 is assembled in China.