This is true. But in the case of Callisto Protocol he might be right about the extra care and optimization on Pro combined with DRS more than settings, as they actually exceed PC in some ways:
Maybe the PS5Pro use lower settings as you say, but I cant tell the difference between my PC running at maxed out settings and screenshots from the PS5Pro version. It seems the PS5pro has all RT features enabled in callisto protocol based on what I saw.
The problem is this game has absolutely no granularity whatsoever and you cannot even change the settings in real time. You have to exit to the main menu.
Lighting for instance can only be toggled between Low and Standard and has a huge performance impact in some scenes while not so much in others. The difference can vary between less than 10% to over 25%. Consoles could easily be using a custom value between the two and only look a bit worse in some scenes and you'd think they're using the same setting.
Another one is volumetric. If you compare still shots, there really isn't much of a difference. You'd have to find the same place and compare side by side. However, the impact between Medium and High can be as much as 17%.
Once again, consoles could be using a custom value or even mix them up depending on the source. It could be large volumetrics use a lower value to save performance.
Another one is particles that can look very similar between High and Medium, but Medium runs 5-6% faster.
Then there's the ray tracing with RT shadows sometimes barely showing a difference but tanking the fps by 30%.
Here's how the RTX4070 runs this game at 1440p FSRQ with RT. That's 960p internally.
Surely, you have noticed this:
The game is completely single-threaded and this shows a severe CPU bottleneck. The 4070 is asleep at the wheel here drawing 116W.
Also, in this very video, the average for 1440p FSR Q is 64fps, but the average for 4K FSR Q is 80fps.
So going from basically 1440p to 4K increased the fps by a whopping 25%. Of course, they tested different areas, but this harks back to the point I made several posts ago that you cannot just use random benchmarks. You have to do like-for-like because as you can see here, the numbers can vary enormously. You'd think this game is more demanding at 1440p than at 4K with FSR Q using that video, but we all know this isn't the case.