If I'm remembering these sound cards correctly, these came back in the day of teh Gravis Ultrasound PnP and Sound Blaster AWE32...the big thing about them being that they had on board sample memory. Very big in the European MOD (another fmusic file format using sequencing information and integrated samples) scene. The EWS was one of the most expensive of these sound cards at the time...
Unless you're really interested in the PC demo and MOD music scene, there's no reason to get one of these very old and currently not all that usable sound cards.