Contact Cleaner vs Brake Cleaner

The best way tell the difference is to look up the SDS. All mfg's have to make these available online. It will list the chemical ingredients and %.

Here is an example of a contact cleaner SDS https://docs.crcindustries.com/msds/3130.pdf
It tells you it mostly light hydrocarbons of some sort and naptha

Here is an example of brake cleaner SDS https://docs.crcindustries.com/msds/5151.pdf
Its mostly acetone