Fargo’s Soul mod or Calamity?

EDIT, PLEASE READ: since this is seemingly the top post when you look up ‘Fargos or Calamity’ I highly recommend just doing both at once, as it still is a fun way experience overall. I will still be answering questions (even like 3 years later lmao), feel free to ask

So a couple weeks ago I completely finished a master mode world (100% bestiary, all boss masks, etc.), and now I feel like mods are the logical next step. I want to go completely blind into either, so no spoilers pls, but in the opinion of anyone who’s tried them, which is better/more fun.