You asked
Ttartisan 7 5mm f 2 fisheye vs laowa 9mm f 2 8 zero d?
I'd pick the Laowa 9mm f/2.8 Zero-D for most people. It's a nearly distortion-free ultra-wide, so buildings, interiors and landscapes keep straight lines. On APS-C it frames like about 14mm on full frame.
The TTArtisan 7.5mm f/2 Fisheye is the one for a fisheye look and more light. Its f/2 is a stop brighter than the Laowa, and it frames like about 11mm on full frame. Expect the curved, bulging edges that come with a fisheye.
Both are manual focus with no stabilisation, and both fit several mounts, including Sony E, Fujifilm X, Nikon Z and L-Mount. If you're new to crop factors, the Sensor sizes page explains how these numbers change on your camera, and the Focal length converter covers depth of field.
Written by Claude from this site's pages.