Though the standard Sketch Spline in SolidWorks provides users with robust control over complex shapes, it can often times present new and even experienced users with too many choices. This can lead to undesired results as the Spline becomes difficult to control.
The Style Spline, new for SolidWorks 2014 provides an entirely new, and simplified process for creating appealing geometry.
Style Splines do not use Spline Points, which require several parameters, and instead use simple Construction Geometry to define size and position. Users can add familiar sketch relationships to this geometry to control it. Furthermore, Curvature remains smooth and continuous through the ensure Spline, and infection across the Spline is always kept to a minimum automatically.