Both schools are great schools and have comparable college acceptances. One thing you will find at Visi is the high number of legacies admitted. These legacies may be fully qualified, but more often than not, may not be as academic as the newer girls applying. What winds up happening is that many better qualified, smarter girls who have no legacy connections are put on the wait list or not admitted. I'm not knocking the practice, it is what seems to have worked for them in terms of keeping a solid fundraising base and the loyalty of those who attended. But it does make your scratch your head when you see lower performing girls going there when some very academic, well-rounded girls get wait listed. Visi is also very connected with their brother school, Gonzaga, which is a nice way for the girls to have interactions with high school boys. They are regulated by the Archdiocese of Washington (making it one of only two Catholic schools you can apply to when making your decision). The HSPT is the test required for girls to get into their school.
Stone Ridge is an independent Catholic school (no oversight from ADW) who accepts the SSAT for admittance. Stone Ridge is consistently rated higher in rankings:
https://k12.nichebeta.com/rankings/private-high-schools/best-overall/m/washington-dc-metro-area/ and is the highest ranked CATHOLIC all-girls school in the DC area. SR is impressive for many reasons - it's commitment to service, which is integrated in the curriculum, it's structuring classes based on the latest brain research, and the international network of Sacred Heart Schools, which allows for easy exchange programs and job connections/networking all over the country and the world.
From what I've heard, both schools are very academic and seem to have similar work loads. The bottom line to me is which school is a better fit for your daughter. Commute is a huge factor, IMHO, and you may want to consider which is easier for you to get to - thinking about social life, sports and integrating into the community. Both are excellent choices - good luck on your decision!