You have the DA 18-55 and the M50/1.4, try it yourself.
Tip: let the camera meter with the DA, then copy the settings when you use the M.
The DA 18-55 is pretty good away from its extremes. Those can be either end of the zoom, wide open, or sharpness and contrast at the edges/corners instead of the center. I have a couple of decent 28mm prime lenses. Compared to the DA at 28mm, the primes are infinitely better at f3.5 or wider, because the kit only goes to f4. At f4, the primes are noticeably better if you are looking for it. At f8, you have to look
very hard. In the center of the shot, they are even.
At 50mm, the M50/1.4 should be a lot better than the DA. It is four stops faster, a really huge difference. That helps when you stop both lenses down to f8 - the kit lens is just one stop from wide open, the M is five stops down.
The next question might be, is it worth it for me to spend more and get a good lens? That gets tricky. It helps a lot to define your needs before looking beyond the kit lens. Good lenses are designed for a purpose, so a good lens is worth more to you if that's your purpose, and worth-less if you don't need it.