I beileve something to consider is that Stillwater Kilts suit a large kilt belt. USA Kilts' casual model uses a smaller, more normal belt loop. Their semi-traditional kilt uses large loops for a kilt belt. Consider what kinda belt you want to wear, as somehow the large ornate belts do not go as well with some of my casual "Kiss me, I'm Irish!" type shirts.

Also, this may not matter to some people, but it kinda sticks me. If you buy a casual USA Kilt, you'll have a Celtic cross patch on the bottom right corner of the front apron. As a matter of personal faith, I couldn't wear it. (And where do I stick a pin?) I believe the semi-traditional model does not have this cross patch.

I will vouch for the standard Stillwater Kilt's quality. Acrylic wool feels (imo) much better than my pv Sport Kilt. I'm not sure about the pv material USA Kilts uses, as I have not bought one, although I'm assumign it's similar. My standard Stillwater Kilt is just ... everything I want right now, but I will say there is a chance I will buy from USA Kilts in the future for their tartan selection and custom sizes.