I only needed to convert to vertex to get the poly count to compare to yer previous counts.  an unconverted spline object will work o.k., hence no need to convert, unless various vertex operations desired.  note that unconverted spline object may be displayed in assembly room (wireframe preview) as vertex obj converted at 100%. in addition, if one hasn't got AI nor APS, the spline modeller (front view) allows similar functionality in drawing vector paths to those two apps, thus saving a bundle of cash if one's only need for those two adobe apps is drawing AI paths.