They were not similar but totally different. And no, it won't be a huge performance boost.

Upclocks are problemativ with power consumption as well. If you keep the Vcore a 10% upclock might already need more than 10% more.

If you need a higher Vcore you can easily end at 20%+ higher energy consumption for the CPU. So more work for the PSU, more work for the cooling and some CPU's might not even run stable at that core clock.

That is why MS decided to check higher clockrates before Xbox One release. And even they only clocked slightly higher, though every MHz especially on the GPU would have helped reduce the gap.

Actually MS alos increased the frequency of the GPU but it's only about 6%.

I know. Just didn't mention it. But if they went only for 900-950MHz the gap would have decreased quite ab it. Totally closing up would've needed 1200MHz though.

Now the 856MHz they clocked up didn't hurt yield rates, cooling or power consumption as it seems. Smart guess, that was possible with the intended Vcore, so power consumption wans't that much of a problem.
Going for 900MHz might already have needed a higher Vcore, way lower yield, more heat...

Sony now has the problem that clocking up CPU's might not work on millions of sold consoles. Even if it works for 80% you'd have millions of pissed consumers.

Same goes for MS. Future revisions could in theory close the gap. But millions of old consoles would emulate an electric grill for a very short time and than start emulating a clunky door stopper.

Agree with you that it's quite doubtful and could result in several problems... but it isn't impossible, as they could as well been doing simulations all this time and see possibility to raise GPU or CPU clock without problems.

Of course they could also do that on the revisions, but unless it is to give more speed for UI or other non-gaming related stuff it would have a big backlash from current users, and if it don't affect games then it isn't really relevant.

How do you know? its a fact that the cpu is the weakest part of the ps4, so a huge bottleneck should be lifted with an extra core

Going by a famous member on this forum, the PS4 doesn't have any bottlenock. At all.

Is Mark Cerny here?

Every piece of hardware has a bottleneck somewhere, just some have less than others

ps4 probl is now better then most gaming pcs. Nice.