What you've written is correct for Wasabi coinjoins, but their new WabiSabi protocol is different. You can read the full technical paper here: https://github.com/zkSNACKs/WabiSabi/releases/latest/download/WabiSabi.pdf. You an also read a simplified explanation here: https://github.com/zkSNACKs/WabiSabi/blob/master/explainer.md. WabiSabi does not place constrictions on transactions having equal amounts as the original Wasabi coinjoin protocol does, and uses Pedersen commitments to hide the input amounts.

Credit where it is due, what they have come up with is impressive, but unfortunately it is rendered completely useless by their surveillance and censorship.