I have to be honest: I am with
@Spybreakjj on this one. Please mind, it comes to personal preference. There is no real ‘way to go’. If you are reading this post and feel like you want a clear winner by debate, forget about that. Go to the Apple Store and see both displays in person.
Now my opinion: I actually prefer the standard, glossy screen. I have been using iMacs in my teenager years and I used the 34” LG 5K2K ultrawide prior to the Pro Display XDR. Ever since I use matte screens, I feel missing out on immersive colors and really the font sharpness make my eyes feel tired. I have been wanting a glossy screen again all the time. I even checked products such as Eve/Home and such.
I actually enjoy a bit of reflection on the screen when the sun shines on it. That may sound crazy, but this is how I have worked on my iMac most of the time. I also like the screen literally shining sometimes. The colors are amazing and the letters are so sharp. It’s like working on a big 32” iMac. My eyes feel much less tired now that I work with a Pro Display XDR. But of course you’ll reach the same effect with the Studio Display. But I just like real nice things.
Needless to say, this comes to personal preference. There is no real technical specification that makes your choice a clear winner. One thing that I can give as an advice: the nano texture seems a bit more difficult to clean without damaging it and most of the problems I have seen like ‘grey spots’, came from screens with nano-texture. On the other side, the nano-texture screen has a benefit: it suffers much less from color shifting and such.