I'm aware Saluc is the parent company. I'm not referring to the Aramith Tournaments. They are made using a different tech. Aramith (Saluc) has even said the Centennials are made with the Super Aramith Pro resin.Saluc S.A. actually owns Aramith. Manufacturing agreements likely restrict knowing exactly what the real differences are.
I’m presuming there must be some slight variations in the resin formula that can get modified and improved upon over time.