If you're willing to wait until December time, the discount may or may not be the same (20%) due to its popularity. I would say to invest in the game. Online sessions, intense battles and technical weapons makes the game unique to it's genre. The Autumn festival is going on right now and there will be another event in line after it ends. The updates between PC and PS4 aren't in sync at the moment. From my spectulation, we'll just have to wait until next year when the two systems will be in check with each other.

Oi, I see you bought monster hunter. It’s on sale rn, think it’s worth a buy as-is or should I wait?