I can only give a comparison of my standard Sport Kilt and my USA Kilts semi-traditional. Both are PV, and both are kilts, but that is where the similarities end. The semi-traditional is much heavier. There are more pleats and the pleats are deeper. The semi-traditional uses kilt straps and buckles, instead of hook-and-loop.

My semi-traditional is not quite as heavy as my wool kilt, but it is still a substantial garment. I tend to wear the semi-trad more than the wool kilt because the PV is easier to care for. But the wool kilt does drape better, swish better, and has a better overall feel than the PV.

I hope this answers your questions to some extent.