St. Rose of Lima has longer history. I was a Maryknoller and had some acquaintances from St. Rose of Lima. They are polite and speak fluent English. Frankly speaking, band 1 subsidized traditional schools do not know Kowloon Tong Primary that much.
SRL is better , they have secondary school for back up , although the secondary school is in Shatin , but they are Band 1 and the english standard is good .