The fizik antares versus x saddle is for the cyclist that prefers a full cut out for maximum pressure relief and is also ideal for the riders that tend to be on their bike for long periods and need a comfortable perch the fizik bike saddle has a deeper pressure relied channel compared to its sister saddle the versus and can cater for the riders that prefer maximum pressure relief without affecting the saddles true nature or involving sharp edges which is a common occurance in cut out saddles