I have listened to both the Shure V-15 V with a Jico SAS and the VN5MR stylus, and overall I prefer the Shure VN5MR to the Jico.
I know others prefer the Jico SAS. Like everything, you get something and you loose something. With the Jico SAS, I hear more detail and frequency extension in the highs and a very nice midrange. However, with the Shure VN5MR, I hear layers of midrange detail with real life texture, timbre, and emotion not quit equaled by the Jico. The highs with the Shure V-15 V stylus (VN5MR), although not as extended as the Jico SAS, still sound excellent and seem to be a little more delicate.
Which is better largely depends on personal listening preference and sonic priorities - and where you with to move the sound of your system on balance.
Unfortunately, due to apparently unexpected demand and being months behind in production, Jico has raised their prices of their SAS sylus in the last year by around 50%.