Per manufacturer, Safe Choice is 22.8% NSC, Safe Choice Special Care is 15% NSC.
I also never had a problem with rice bran granules in soaked alfalfa. But, ricebran also is around 20% NSC, so the alfalfa is the better choice for gain.
As per your friend Sarah on another thread, treating stomach ulcers with meds, " just in case" could backfire and create hind gut ulcers.
IMO, once treated, prevention is key. Free choice hay, no grain , low NSC and alfalfa as buffer for the acids will be enough. No U-gard needed then.