FC5 is a 'better' game in the sense of more polished, but overall FC6 is more fun for me. To ensure you're glad you asked, here are notes I took while playing
World
Bigger by a lot
Lighting upped
Setting great
Atmosphere less
Soundtrack much less
Textures better
Fauna similar
Flora great, dynamic
Story same
Arcade gone
UI
Mini map much better
Corpse X gone = worse
Corpse auto-loot = better
Can't lose weapon = great
Cutscenes skippable = great
Launch & Exit 1-click = great
Photo mode on auto-drive
Random sounds & messages
Tracking unwanted targets
E key for:
Loot
Revive
Interact
Climb
Talk
Close
Use Mortar
Use Mounted Gun
People
Protagonist much better
NPCs more, better
Buddies much worse
Weapons
Ammo switching stupid
Specials worse than standard
Sidearm useless—no, DEagle!
Sniper not needed
Melee all gone exc machete
Gameplay
Pick up ammo better
TPP in camp terrible
Chute better
Perk select very bad
Air drop launch direction off
Loot way too much manual
Checkpoints much too easy
Difficulty very uneven
Leveling way overdone, unclear
Buddies less help
Stats improved
Headshot crunch good
Enemies don't auto-attack
Healing automatic = worse
Boss fights far better, doable
NG+ great
PG 240 missions too similar
Quality
Buggier
Graphics better
UI worse
TPP nav awful
Libertad Mod
> excellent Resistance mod
Change time of day
Civilians Kill Limit Remover
'Pickup Outline' set to pink
2023-02 thread re mod
Dislike
Amigos underfoot.
Ammo changing ridiculous.
Camps TPP horrible movement.
Corpse indicators not in game.
Easier by a lot than previous FCs.
Launch to Game time.
Main island, no FT point for a long while.
Perk & Health systems a mess.
Sidearm—no indication if weapon is one.
Sounds popping all the time—meaning?
Tracking unwanted quests.
Like
Alt-Tab flawless.
Cut scenes skippable.
Ladder climb down is 1 slide.
Launch to Game unattended.
Libertad mod ***
Loot via run past *
Mini map is round again.
Peaceful enemy encounters.
Photo mode.
Quit to Desktop.
Weapons—always available.
Weather.
World best yet.
2023-05 post re Like-Dislike
Above isn't all valid now of course, as I've discovered things in subsequent playthrus.