14mm f2.8 ttartisans or 7artisans recommendation for s5ii landscapes and astrophotography,sunstars

hello, does anyone has one of those lens. I read some reviews and at f4 the ttartisans make good 8rayed sunstars and I know the 7artisans make 10blayes sunstars but do you know from which aperture they start? and also which one has less flare resistance? thank you