I have about equal time played on both, and I’m going to give you way more information than you probably want/need…
The PS4 pro actually does a very good job of looking great and giving you a solid framerate (there is an option to “prioritize framerate” over visuals, and it feels like it gets to 60 in most spots without any (to my eye) noticeable downgrade in quality). The load times are way worse, but some folks have fixed that by installing an SSD. Playing on a big TV over monitor is better, who doesn’t want to see these monsters on a bigger screen?, but the text on screen can be hard to read from the couch (there are a lot of menus).
To get a great looking version of MH with a respectable framerate on the PC, you need to have a pretty beefy system, and spend some time tinkering with the many settings. If your system can run it well, it will look amazing. Way, way better than anything a PS4 pro can dish out. It will also play better. Since the combat is animation based, better framerate = smoother combat. Load times are only a few seconds, and it’s somewhat easier to connect through steam with your friends.
However, the player base is substantially less on the PC. While it’s not a huge problem, it is way easier to find full rooms with chill players on the console. There also appear to be (and this is totally antidotal, I have no hard numbers to back this up, just hundreds of hours of game time) way more Japanese players on the console. Which may not seem like a big deal, but I find it cool to play with super good hunters who are chill AF.
The console also gets all the free DLC way, way earlier than PC. Which is a huge f’ing problem because on PC you don’t get to experience the freshness and discovery of a new monster, event quest, etc. By the time the content gets to PC, the community has figured everything out, the meta is set, and you feel like you’re just following behind the crowd.
PC gets mods. So that’s a huge plus if you use them. But I think most mods ruin the game. I have a friend who insists on running damage meters (which he posts at the end of the hunt), health bars for monsters, etc., and it just absolutely ruins the game for me.
TLDR;
MH on the console feels to me the way MH is intended to be played, with discovery, a large, chill community, and on a bigger screen. But the PC version looks so, so much better, load times are quicker, and it’s easier to connect with friends. I can’t really say which is better, and I love the game enough and have enough PC exclusive friends that I’m happy to buy both versions.