MD offers Algebra IA and 1B which count towards graduation. Is that really your basis?
I have 2 boys at/through Servite and 1 through Rosary. There is a difference but you have it backward. In our experience, Rosary was more rigorous, grading was harder, and expectations higher.
Servite has many differences from Rosary, but academic superiority is not one of them.
No, I never once posted anything Alg. IA and B, but I will go through what I did post and add Alg. IA and B so you understand where those courses fit in.
Algebra IA and B, which Servite also offers, is different than Pre-Algebra. The actual Algebra content of pre-algebra is less than 75% of Algebra I and in most cases much less, this is why once students take Pre-Algebra they are then moved onto Algebra I or IA and B. After students comlpete Alg. I or IA and B they move on to Geometry. Servite does not offer Pre-algebra and it is not unusual to ask freshmen who have previously taken Algebra I or IA and B in junior high to repeat the course at Servite. The Math requirement to graduate from Servite is to have taken three years of math beginning with Algebra I. Rosary and MD and almost every other public and private school in Orange County accept Pre-Algebra for teh purpose of meeting math graduation requirements.
I am surprised that as a parent who claims to have sent kids to both schools you do not have a better understanding of each schools graduation requirements.