Some of the machines have chemical packs that plug into the machine. The machine does all the mixing etc. You need to avoid these.
I disagree they are all the same. The fuji bleach I use is low replenishment. They make a different one that is rapid. Both Kodak and Fuji hunt used [might still] have all the documents on their websites. C-41 plus all the variations.
The newer Kodak and Fuji chemicals don't need stablizer . Or so I thought.