Comparison between Leica lens and Zeiss lens?

Zeiss has the strongest optical performance, followed by Schneider and Leica. The optical market of Zeiss is mainly concentrated in high-end markets such as medical treatment, industry, scientific research, aerospace and military industry. It looks down on the profit of camera lens, so it hasn't produced original Zeiss lens for a long time. At present, most Zeiss shots on the market are authorized by Zeiss (mainly 135 frames are basically fake Zeiss, while on 120 frames, Hasselblad's shots are real. Schneider is generally engaged in medical treatment, industry, aerospace and focal plane, and there are few camera lenses. Leica's profit points are mainly in scientific research, industry and cameras. Because Zeiss doesn't make camera lenses (Zeiss's glass and coating manufacturers can't do it) and Schneider doesn't make camera lenses very much, it is true that Leica's lenses rank first in the field of photography.