I have two UK's and a sport kilt.

I think of the sport kilt as my "summer" kilt or the one I'll wear if I have to spend all day sitting down.

Also, if I have to go semi-formal, I'll wear the sport kilt just because it looks better with a dress shirt.

The Sport Kilt has one pocket. A wallet-sided pocket on the inside of the apron. I've put a six pack in the pockets of my UK.

If, for some reason you are considering the ACU pattern Sport Kilt, the ACU pattern in their photos are sideways.

Both are damn fine kilts. Pick the easy route and get one of each.