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I also tend to agree about Ritter Sport, because I was specifically looking for it (I grabbed it today right from the cart with the new delivery and was afraid it wouldn't scan at the checkout), while I bought Schogetten on the weekend at a hypermarket in the outskirts of the city, when even there Ritter Sport wasn't available.
As for foreign brands, I've only tried these two and Lindt (well, you can consider Milka, because judging by the code, I did buy it from a foreign manufacturer), but Lindt and Milka somehow taste artificial, Alpen Gold also tastes artificial, Schogetten and Ritter Sport are 10/10, and among domestic brands, I like Plan B from Kommunarka (Belarusian, but that doesn't matter), and of course, Busheron and Felicità with liqueur and candied fruits (specifically this one, the others are somehow artificial, including other chocolates from this brand). Babaevsky seems tasty, but it's a bit heavy.
My absolute favorite is the dark Busheron with pepper. It's probably for a specific taste, but it's 146/10.
I should make a list of my favorite chocolates, but I can't be bothered right now.