Reply To: Diet Coke or COFFEE?! Home › Forums › Controversial Topics › Diet Coke or COFFEE?! › Reply To: Diet Coke or COFFEE?! March 27, 2019 11:12 am at 11:12 am #1702906 DovidBTParticipant I drink both, but coke is easier on the digestive system. It’s like flavored Alka Seltzer + caffeine.