I'll go one step farther and say which stem program works best depends on your goal. This thread is based on stem separation for bass and IMHO that is not the main goal for a single sound separation for many people. Separating the vocal I would surmise is the main goal for many and the free Ultimate Vocal Remover does an excellent job on that task.
YMMV


Dad, how will I know when I've become an adult.

When your day is ruined because they rearranged the grocery store.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware