Have used Yellowstuff in the past and they’ve been great from the get go.
Much better than Greenstuff, they have good cold bite and work well in all conditions especially when heat in them (fast road use), for track pads I’d look elsewhere.
Ferodo DS2500 are even better but I always got horrendous screeching sometimes, mostly when newish and cold, not the best for daily driving if I’m honest.
I lived with it, as I liked the braking performance.
No experience with Redstuff, but I’d recommend Yellowstuff for fast road use, they do a good job.