You both used more words to elaborate on what I said. "...once she fires an un-silenced shot they react to her"
They aren't the same because the AI in MGSV investigates sound. So if she's right next to them moving like that (which isn't often sense her scouting vantage points usually are in areas that aren't close to enemies like that, but whatever) they'll go check it out... it doesn't break the game because once they get there, they won't find anything anyway. Just like when you make a noise with Snake and they come to that location to see what it was. If you're gone they'll either drop it or call it in to HQ.
Even with D-Dog, the AI will see him and shoo him away before combat. If you tell him to take someone out, if they spot him while he's approaching they will shoot him. So how is this "exactly the same" when comparing to Ellie who's ignored 100% before the action music cuts on in TLOU?

The Ai in TLOU investigates sound too breh. You probably forgot but TLOU AI isn't oblivious as you're making it out to be.
Look at this video. The whole video. It's only 4 minutes. You can't tell me you don't see similarities between this and MGSV AI. in some respects TLOU AI is way more realistic during combat with regards to how they can flank you, react to what you're doing(He's out of bullets! Oh shyt let him go!! You'll pay for that bytch!!) I've seen AI outright run away from me because
they ran out of bullets.
On Grounded mode the AI is even more aware. A little bottle that you run into will have them on alert.
That's pretty impressive for a game that's 2 years old by now. It's not as brain dead as you make it out to be. They react to your weapons, who you have at gun point, if you left they follow you and diverge to find you. It's not as "dumb" as y'all trying to make it out to be. I'm not saying it's perfect and/or it's straight up better than MGSV but it's not "trash".
If you run across some bottles or something on the floor in TLOU, the AI
will hear it and come over. If you throw a brick somewhere they'll see it's nothing and probably just go back or w/e.
As for MGSV, if you're far away from an outpost and you send Quiet to scout the area or to change locations within that area, she'll often times run RIGHT PAST an enemy soldier as in literally through them and the enemy doesn't do a "Huh? what's that?" or anything. They just continue on to their patrol route as usual. It's the
same way TLOU handle's Ellie's AI.
Hell,
sometimes the AI doesn't react to the Dog.
This mission right here the guards were stuck on stupid. I literally shot inside their with the tranq and they just stood around and didn't come out to investigate or anything.
Like I said, Ellie, at times will probably move nearby an enemy in TLOU and the enemy will probably not see her and even though Ellie does a good job most of the time by not blatantly going out in the open. Most of the time she stays behind you in cover or hides around you.
It's literally the same method man. You example with D-Dog ignores what I been saying all along. D-Dog is a tool with you. It's literally no different if he was a bottle or a decoy. The AI sees the Dog just like if they seen the walker or Horse. They just react to them differently since it'd be dumb to have one reaction for a dog, horse and a walker gear.. It's no different if it's the Horse or D-walker except they'll start shooting at D-Walker since it's basically a weapon. Y'all not seeing the similarity?? D-Dog, D-Walker, and the Horse are apart of your weapon loadout for a reason, they can be used in game and are treated as decoy. Ellie, is not a controllable character or someone that you can command on your own. Her being invisible so to speak is the same as Quiet being invisible prior to alert mode.
The AI will never be alerted by Quiet no matter how loud she is and her moving through the world is pretty darn loud. Imagine if Quiet could alert enemies just from the sound of her running around to different locations?? You stealthing around and she moves and her sound effect causes shyt to get real and now you're basically not safe anymore. That'd cause so much backlash from fans.
Also... She's not technically not fully invisible as the cutscene when she lands on Motherbase shows that with night vision goggles worn by the soldiers, she's visible so that invisible point doesn't hold up. It's literally the same thing. it'd be absolutely stupid if the Ai in TLOU could be alerted by the movement or mistakes Ellie does which you're not in control of, especially so when stealth is an viable option. You can't have companion Ai be as perfect as the player against enemy AI, that's just not possible.
They're literally the same breh.(Pre battle)