I've been hooked on the Klasse twins for the longest time (and I still am) but I had some Souveran that I needed to use. On my car, I'm ecstatic with the twins but Souveran gives something different: the color is deeper and wetter. Souveran can't touch the vivid reflections of light sources on the paint like Klasse, it doesn't show the metallic as well and it sure doesn't last as long. But, while Klasse on my car is very wet, Souveran makes it look dripping wet, as if it just came out of a vat of paint. Souveran also darkens the paint slightly to give a luxurious look.
10th Anniv. Ed. Miata
10th Anniv. Ed. Miata