@You focus on BS degrees and I think that is misleading. There are differences in how institutions decide on BS or BA designations. As indicated in a prior post, UVA does not use BA for math or statistics and they are not alone in that, and computer science majors can get a BS through the engineering school or a BA through arts and sciences The SCHEV data counts degrees by field and that should be a better indicator.
But more to the point, quantity doesn’t equal quality. If that was the case, both VT and UVA might be able to claim supremacy over Caltech in sciences. If you want to evaluate quality of department faculty, you might want to look at graduate ratings in science fields in USNews and research spending. But these are probably not very good indicators of undergraduate education quality.