Which is more powerful, Star Chain Music Postgraduate Entrance Examination or Music Postgraduate Entrance Examination Through Train?

I haven't heard of the latter, because some students around me have signed up for the Star Chain. I know they are all online courses with high quality and cost performance. Friends say that their teachers are all seniors who graduated from the music postgraduate entrance examination, and they are very professional. In addition to attending classes, there is also a one-stop service in the whole preparation process, such as summing up notes on knowledge points, taking back the key points of the exam, and answering questions online anytime and anywhere, which is very helpful to the learning progress. I'm also listening to their audition class recently, and I plan to sign up for the class.