The first is the faculty, that is, the reserve of teachers.

The second is the teaching form, which is nothing more than one-to-one or one-to-many.

Because the most important thing for training institutions is teachers, this is only inevitable. And the teaching form is how much knowledge you can get from training institutions. Personally, I suggest one-on-one comparison, because it will include after-sales service. Not that you finished learning today, but who will you ask if you have any questions later?

Now teachers usually charge for helping you solve a difficult problem, and the price is generally not low. So don't be greedy for temporary cheap and ignore the quality problem.

Although I can't suggest which one you go to, I suggest you look around and choose one, preferably on a field trip.