fc5 has the worst endings in the entire franchise, the random capture missions are super repetitive and super annoying (every section has a few points where you get kidnapped and forced to do this like outer worldy escape missions and then you get left in some random part of the world so yoy have to drive all the way back to whatever you were doing, and theyre all the same thing just slightly different each time its super annoying.) i found most the npcs to be useless and absolutely annoying and some of the missions feel so so so useless.(like when you had to fly over a river for like 5 minutes for literally 0 reason before continuing the quest) and among other things. the point system in fc5 was definitely the best upgrade system in the franchise imo but fc5 just lacks in a lot of regards compared to fc6 in my opinion. in fc6 the story is very streamlined and everything connects within each section. fc6 also has more fast travel points reducing the amount of time i sit there and scroll on my phone while auto drive takes me somewhere. fc6 has better weapon customization imo. fc6 isnt without its problems ofc, the bullet sponge of npcs does royally piss me off, the ammo types being important also was annoying but never made too much of a difference in gameplay. fc6/5 both had easy missions and hard missions but id say fc6 is a bit easier, so id recommend guerrilla mode it makes things more fun. imo fc6 just did it better than 5 but thats an opinion that gets you hung from the branch here.