Which do you use and why? Which one gets it cleaner. If it matters we have “real” winters here, meaning snow cruft and salt that absolutely must be removed.
Edit to clarify: I’m talking about a choice in automated car washes- not hand washing cars. Seems people are getting confused. Touchless is a few passes with a pressure washer. Soft touch adds spinning car-wash brush things.
the colored foam is just dyed car soap, so it’s helpful in that it’s soapy water.
I do the option with undercarriage wash and call it good. (particularly in winter.) in winter it’s about getting the salt off before it does unpleasant things to the exposed bits. (breaks come to mind, suspension components. everything else, too.)