Scheveningen and Dragon are both well-known systems, but are perhaps not quite as solid as the Najdorf and the Shveshnikov.
Sicilian Variations Tier List
Ik it's all fine for us I'm just curious how theyd be classified into tiers based on top level practice
I mean... it's very different depending on your skill. For example, for 99.99% of all players the dragon is a fine variation... but for the top 10 players it's a fancy way to show off your 30 (or more!) moves of theory and black is escaping with a draw.
The Scheveningen has fallen out of favor, but in the past it was played regularly by Kasparov... meaning it's an extremely high quality opening that's good for 99.99% of us.
The Scheveningen has fallen out of fashion due to the Keres attack 6. g4! I personally do not like the dragon because the yugoslav attack just crushes you unless you know all the theory. Even then, you only get a drawn position. The Sicilian taimanov is the only other sicilian I can think is used at the top level.
Another out of curiosity post. I heard that the Najdorf and sveshnikov are supposed to be top tier but idk about the other s