Which are the main differences between this two models??
i was gonna buy the yamaha s90es in the yamaha store near my house... but found out that there has been a new version in the market for quite a long time now...so , in general terms which one is better???
i was gonna buy the yamaha s90es in the yamaha store near my house... but found out that there has been a new version in the market for quite a long time now...so , in general terms which one is better???