I wish I could upgrade the lens on my P3A. Is it possible? Here are 3 photos, all taken from the same distance and cropped. The Sony is the lowest res but has a Carl Zeis Lense. Is this a fair comparison?

Phantom shoots flat. It makes it easier to do postproduction.  I think it would be better to see the quality or the original images

To answer your question, no, it is not a fair comparison. And any shot taken with the Phantom should be an aerial shot, not taken so close on the ground, as the lens does not focus well on close objects. My next point would be to ask how you intend to judge the lens quality when all 3 are totally different sensors.