You asked
Zeiss distagon t 35mm f 1 4 zm vs 7artisans m 35mm f 1 7 seagull?
Both are 35mm manual-focus primes for full-frame Leica M bodies, so the choice comes down to aperture and finish.
The Zeiss Distagon T\* 35mm f/1.4 ZM is the faster lens. It gathers more light and gives a bit more background blur, which helps in dim rooms and portraits. If you shoot a lot in low light, I'd pick this one.
The 7Artisans M 35mm f/1.7 Seagull is a little slower, and it comes in silver only. For everyday street and travel shooting at f/4 and up, the difference in aperture rarely matters. If you want a 35mm for Leica M bodies without spending more than you need to, this is the one I'd look at first.
Both fit the same Leica M bodies, including the Leica M11 and Leica M10, so the camera doesn't decide it.
Written by Claude from this site's pages.