You asked
7artisans 50mm f 1 4 tilt shift vs 7artisans 50mm f 1 2?
Both are manual-focus 50mm primes for APS-C, and they share most of their camera list. The main difference is aperture. The f/1.2 version gives shallower depth of field: on APS-C it behaves like f/1.8, against about f/2.1 for the f/1.4 tilt-shift. It also adds Nikon Z to its mounts, which the f/1.4 doesn't list.
If you want the most background blur and low-light speed for people, I'd go with the f/1.2. If you want to play with the tilt-shift control, the f/1.4 is the one named for it. My site doesn't list prices, so check those before you choose. For a sense of why a 50mm suits portraits, see portraits.
Written by Claude from this site's pages.