Vibram does a variety of different rubber compounds, some are super grippy, some are quite hard – a bit like tyres – some are okay in dry, warm conditions, but lose grip at low temperatures and in the wet, yes, like tyres again. Unfortunately you’re at the mercy of which particular Vibram sole unit the brand has specced for a particular boot, but there’s a wide variety
If you want grippy, the Vibram Megagrip compound is pretty good. Mostly it gets used for approach shoes and some trail-running shoes, but there are more mainstream boots out there that use it. The Asolo GV boots for example, which are classic modern hiking boots but with a Megagrip sole unit.
There’s also a Vibram compound called Idrogrip which is designed specifically for grip on wet rock and is used in a few approach shoes I think. Should be a good call for ghyll scrambling, er, Scarpa Gecko.
The Graphene-enhanced inov-8 rubber is good and they’ve recently launched a lightweight dedicated walking boot.
Salomon’s rubber compounds seem to be a bit gash in the wet, as has been said already. But with Vibram it depends on the sole unit.