Why is it so easy for me to get off Soda than Snacking?

So i am now 1 Week almost 2 technically Soda Free living >.>Well to a degree i do drink 1 0.5liter Soda in the Morning to intake my Meds but i drink 2l - 2.5l Water on top of that basically :PBut basically what has happened is that i just cant seem to get off Snacking >.>I have a few Days ago tried drinking a Diet Soda again and it tasted horrible >.>Like yoiu feel like you get a Heart Attack if you drink a liter of that Crap >.<But when i wanna eat Chips or Chocolate then i have more of a Craving on there than Soda really >.>Does anyone have Tips or explanations or like something to help maybe Crave it down? >.>Afterall i do not would say i do it because i am a "bored eater" but more so because i just crave it to a degree as i am quite busy (atleast if Video Games and Watching Anime/Cartoons Count XD) to a degree >.>