Stealth isn’t strictly about not killing or hiding. I can kill everyone in a room without being seen or heard, and do it in different ways.
What exactly can you do in MGS? Hide in a box?
Play on grounded.
I'm sorry, you know mgs like the palm of you hand but you minimize the stealth in mgs5 to hide in a box?!
The game well know for being one of the most various stealth game in existence and the reason why he got those high scores (since story and delivery was trash compared to old titles)
I mean even a comedy video like the one made by dunkey show how many funny shit you can do in the game, well beyond what you can do in tlou2 (where i have 2 run on hard and grounded), mgs5 is basically a stealth playground, you have rocket punches, companions, weird shit like the big boss inflatable thing, you can literally make fall a box of ammo into the head of an enemy with the aerial support...even simple things like crouching on the side of the horse to not being seen.
Tlou2 biggest limit during stealth is that it is a grounded and realistic game, no space for cool gadgets and shit because they would be tonally off.
You have your bush, your pass throught tight spaces (revolution...) , your throw a bottle to distract and very few other things, same for the combat, realistic weapons and realistic melee, even days gone, another kinda realistic tlou wannabe game, probably has more gadget to play with, then you have the dogs that follows your smell but they are too slow to really pose a threat in those big sandbox maps if you are not completely retarded or just shit at stealth games, even the new infected are just a different iteration of the creatures in dead space 2 or even the fucking lycan in the order, they attack and they go to hide and repeat, big fucking deal.
I hope that you don't consider climbing, jumping or swimming (all new things in the sequel) something new or exclusive to tlou2...
One things that tlou2 does immensely better is how punchy, gorey, well animated the combat is, mgs5 exactly like death stranding has shitty hit reaction\ragdoll\rigid bodies\lack of gore and very clunky melee.
Also the atmosphere\thrill is better in tlou2, yes.
But in term of variation? Mgs5 wins for sure just for the share amount of quirky stuff you can deploy.