I played the Yani and SX90 next to an Amati, Antigua, Cannonball, and YSS475. I chose the SX90 over all, due largely to the amazing sound and tone. It was the perfect one for me. If I were you, I would certainly play them side by side with the same mouthpiece and reed. Then make your choice. As far as I'm concerned, they're both great saxes. But the Keilwerth was for me.long island tenor said:Has anyone played both? If so, I am curious as to your opinions.