Professionally speaking, it must be much higher in the Central Conservatory of Music. We should know that the purpose of training students in the opera performance department is to become opera singers in the future. Of course, there may be solo or chorus, depending on the students' own level. If the two schools are well-known from the perspective of employment, it is mainly because education in this area is the primary factor to enter the door. This is the threshold, and the final admission depends on your own singing level. It can't be said that all the students in Central College are top-notch, nor can it be said that the students in the music department of ordinary universities can't sing well.
If you want to study, I suggest you listen to them. Their classes are more professional and comprehensive. Many professors were singers when they were young. They have a high level of singing and rich stage experience, which can give you a higher level of guidance.