I've been using a N235 since August for face-to-face teaching. The N235 fits snug, and I'm able to smooth the mask's top to fit the contours of my nose and cheeks, effectively preventing my glasses from steaming up. The bottom portion fits well, too, and it stays under my chin equally as snug, and I'm able to lecture for a few hours a day with no slipping, no annoying chafing, and no drawing the fabric into my mouth. I like the foam around the frame, and rigidity of the mask material creates a nice buffer between my face and the mask. These are my favorite masks by far, and I feel comfortable teaching in a socially distanced classroom in the N235. I highly recommend the N235 for professors and teachers. My colleagues in lesser masks often complain about the steaming glasses, the grossly warm, damp fabric, and the slipping and sliding of the material. I've experienced none of that with the N235. So I'll tell you what I tell my colleagues and friends: try the N235.
I've also purchased the XPRS for my class in which a student relies on lip reading, and I'll be posting over on that specific model's review page too.