Actually, it is superior in some ways to the OR version and the main difference that matters at all is the dust cover being absent. The bbl., being a 1/8 twist and a "sniper type of twist" ala the gvt. sniper rifles with a melonite coating is, arguably better than the 1/9 chrome lined bbl. for practical purposes.
It also comes with sights which the OR does not and has garnered very positive reviews from owners here and elsewhere.
I think what is really important to most people on a budget is that it is READY TO USE AS IS. If you intend to add better sights other than a red dot that can cowitness the irons, a free float rail and other expensive adds, finding a model already equipped for those things might make more sense. the general ideal of not having a dust cover or forward assist is not important for a target or home defense weapon.
The Sport is a really good buy IF it meets your intended use purposes.
I have an OR version that I really like so my opinion is not an "owner's" prejudice but is from thinking the rifle really hits the niche it aimed for without much of use being sacrificed and manages to exceed some higher priced models in the bbl. area.
JMHO/YMMV