You asked
Leica noctilux m 50mm f 0 95 asph vs ttartisan m 50mm f 0 95 asph?
Both are 50mm f/0.9 primes for full frame Leica M bodies. They're manual focus with no stabilisation, and the same cameras fit both, so the choice comes down to the lens.
The Leica Noctilux-M 50mm f/0.95 ASPH is the fastest M lens, and it's the one I'd pick if you want that wide-open look. Be warned: it's heavy, and focus is very thin wide open, so budget some practice time.
The TTArtisan M 50mm f/0.95 ASPH gives you the same focal length and maximum aperture on the same bodies. This site doesn't list its weight, price or focusing behaviour, so I won't guess how it compares on those.
Either lens works on bodies like the Leica M11 or the Leica M10. If you're new to primes, the lenses guide explains why a fast 50mm is worth having.
Written by Claude from this site's pages.