I own two saxophones, a Selmer Reference 54 and a Keilwerth SX 90R Vintage.
Mainly, I play on the Selmer. However, both saxophones are professional instruments and you can hear and feel that, especially when you play them yourself. The saxophones sounds this way because they have appropriate mouthpieces and reeds. I had to search for a long time until I found the best accessories for the saxophones.