my car is CSG, but like others have said, the color doesn't REALLY matter, although there may be arguments for being pickier about products for darker colored paints. Generally red and other lighter paint colors will do fine with anything.
My car currently has Hydro2 topped with Collinite Insulator. But I am about to try out cQuartz UK. Its definitely a more advanced product though and for beginners/ease I would probably recommend Wolfgang Deep Gloss Sealant if you only want to buy a single last step product.
Would also recommend some sort of paint correction since dealers tend to not properly treat the paint. I guess it ultimately depends how picky you are about the gloss/condition of the paint before protection so if you like the way the paint looks now, then just a proper sealant would be good.
I've also never had experience with all in one products so can't speak for the Menzerna being recommended. However, for a starting/solo product, I can definitely see the appeal in just having a single step correction/protection.