I had put together a list of differences between the 80th & Sahara.I would definitely get the Sahara based on the options you are getting and the small price difference between the two($1860 msrp)
The sahara comes standard with the following which you are ordering on sport S anyway:
- side steps
- tech group
- sirius xm radio option
In addition, you get these extras:
- HD brakes
- convenience group(homelink)
- upgraded interior(dash trim, leather door handles, nicer seats
- Extra outlet for the rear seats and I think rear USB chargers are on sahara but not sport as well
- upgraded exterior - nicer bumpers, painted fenders, grille inserts, etc...
Also, higher trade in down the road.
The '21 Sport S now has the Tech as a required option.
The Sahara has a different suspension which is probably calibrated to the 18" wheels. Someone mentioned the Sahara also has ambient cabin lighting as well. If you were to lease, the Sport models variations have better residual values than the Sahara (which results in a cheaper monthly payment)