@Alphorn
The overall construcion is very different from any R1 Jazz horn and a Performance horn.
The R1 Jazz have a post-to-body construction (like any Conn, King, Keilwerth... and even Borgani)
The Performance (alto and tenor) has a more traditional post-to-rib-to-body.
The Performance have a detatchable bell. And the neck profile (other than the bore) is very different, very Selmer-like (if not a Selmer-copy).
Keys are different, key cups are very different. Even the key touches are different
According to the pics you find on the internet (on a Performance horn)... the key rods looks larger in diameter (more weight but more stability) on both Performance alto and tenor, compared to their R1 Jazz cousins.
It's hard for me that some "innovation" they have brought out with the Performance Line were not applied to the R1 Jazz before.
I really miss the "R&C identity" from the Performance sound samples.
If you are going to buy a R1 Jazz... it's not for its supreme performance/intonation/ease... it's because its unique sound.
I'd hardly consider a R&C Performance a "best buy" in its price range.
If you own a R1 Jazz... one of the two biggest complain a saxophone technical makes on a R1 Jazz are that:
- the key cups could be less convex (in order to make the pad setting easier and avoiding to use to much glue)
- the key rod of side keys are too thin (clarinet diameter size)... not a problem but bigger rods return a better feeling and a greater sense of solidity.
(- assembling and overall setup can be sloppy sometimes...)
Many reported issues/inefficiencies on R1 Jazz can be fixed by a skilled technician, leading to a solid reliable instrument!