I'll have to do up a spreadsheet or something to compare them.. or I'll just go grab a few bags at the store and compare the ingredients and values. Hopefully I'll find something that works!
Has your dad patted himself on the back yet for raising such a responsible, logical, and reasonably thinking young lady?
Maxi-Glo is made by MannPro; a livestock feed company that has been around forever and has a great reputation.
I haven't been able to buy Equi-Jewel rice bran for several years, so have been buying Maxi-Glo instead. It does not have anything extra in it, just plain rice bran
I suggested a ration balancer over grain due to the ulcer issues - even if they are infrequent. The rice bran would make up the fat difference and enhance her energy level in a positive way
Also, just for your notebook, sometimes ulcers can cause problems when a horse is wormed, given bute or aspirin, or sometimes standard vaccines may cause flare-ups. It might always be prudent to remind the vet of the ulcers and to keep her on pre-probiotics before wormings.
My Arab has mild gastric ulcers, but can be wormed without issue; he and the other three are on a pre-probiotic. The TWH with hind gut and suspected lipomas is another matter. We haven't had to face worming since his diagnosis and I am not looking forward to it, if the fecal results say "he needs wormed".