[RedDevil]

There's a corner on one of my possible commute routes that allows for safe cornering speed testing, which I did when I had it new.
On its summer tires I was able to round that corner at about 55 km/h in the dry at OEM pressure. On winter tires that was just 51 km/h. That was disappointing.
It also did not feel stable and was sensitive to wind gusts.

Then I raised the pressure in steps from 2.4 to 3 bar (app. 42 psi). That raised the possible cornering speed to 56 km/h in the dry, and the wind sensitivity was all but gone. It felt much more planted all round at the cost of producing slightly more noise.

The summer tires on 43 bar allow for 57 km/h, raising the pressure did not made as much a difference (4% instead of 10%) as on the winter tires.
Then, my winter tires are 175/65 R15 on steel 15"rims while the summer tires are 185/55 R16 on alloys.
The summer tires are stiffer by nature and 6% wider, so just for that the winter tires would need 6% extra air to compensate for the shorter width of the contact patch.
But I did not want to go higher (than the same 3 bar I use for summer tires) on the winter tires because of the slight increase in noise and I was at max sidewall already.

My new (used) set of winter tires have a higher sidewall rating and are less noisy, but as used tires I don't know if they hit a kerb or pothole in their early life so I'm cautious, only raising in small steps and checking for anomalies. Actually they were resonating a bit in the first few days but that disappeared. I think they've been on a car that had not moved for a long time, and under-inflated at that (even down to 1 bar).
I would not recommend over-inflating tires you don't know the history of.