This is the model of Alto I play. I'm not exactly a sax connoisseur though, the only other sax I've owned was a Stagg 77.
Picking between a Buffet crampon, a couple of Yamaha's and a Mauriat, the Performance spoke to me more and felt more special at the time. My sound was a bit more rounded and colourful Vs seeming a bit harsher and cutting. I'm sure aesthetics played a subconscious part too, I loved the look. It was all a bit impulsive though, I was not long into a comeback after 10 years of not playing at all.
A year later, it's still going well I don't regret my choice - but also don't have any recent reference points.
I bought from sax.co.uk - I've no idea how much work they had to do to get this ready-to-play but my understanding is they are one of the shops that do do that.