The difference between PIE vs Packaged can be dramatic. Or are you talking about the final product already?
Also, Blueprints vs C++. And AAA will utilise custom solutions in order to address bottlenecks. Do note that the big boys collaborate with GPU drivers’ engineering teams. Hardware driver Game Profiles have been a thing for years. You must have seen something along the lines of nVidia 500.xx boosting this TombRaider by 13% or thereabout months after the release…
There’s a plethora of tricks, smoke & mirror techniques when it comes to optimisation. One can’t compare a solo dev to a team with 20+ years of experience.
The opposite also happens as often, the final AAA product runs like a three legged dog only to receive a ‘performance patch’ that reduces the fidelity of the visuals 
Besides that, consoles are closed ecosystems and, unlike the PCs, boast virtually no modularity. You know the exact hardware of PS 2,3,4,5 - you get to optimise with a lot of confidence. There are few moving parts. Also, as the time goes by, developers learn how to squeeze more performance from the same console hardware. It’s a must since 7 years is a looong cycle.
A well optimised console game will perform much better than on a PC with matching hardware. On the other hand, an average PC gamer will happily exchange the innards of their PC at least twice in the same time period, eventually outclassing the console. If you throw enough £££ at the problem, you’ll end up with a solution one way or another.
Scalpers + Covid shortages created a weird dynamic where folks were unable to upgrade that easily, though.