I went with the sport on my 2020 lone star. Big fan of them. I think the general consensus on this site is this for the differences:
If you run tracks, full flares are almost mandatory. If you ride in a lot of mud/snow I think the full flares could be good as well. It depends on your riding and what look you are going for. Since we don’t see too much water/ mud out here in the desert, I went with the sports. I like the the look of the sports too, just my opinion.
I have some pictures posted on my build page of the sport flares installed if you want to take a look!