I wouldn't say that the appearance difference was really worth the price difference.
Souveran or P21S are close enough that you aren't missing a darn thing. Put some Platinum or Zaino or
Klasse under that Souveran and it will kick the crap out of Zymol any day of the week. By themselves they are so similar that all either one really needs is just a little edge to appear better. I really don't think you could tell the difference between them.