Ur vinegar amount is increasing while the baking soda amount is decreasing. When the larger amount of vinegar is applied to the small amount of baking soda, the reaction energy is greater. On the other hand, when the small vinegar amount is added to the larger baking soda amount, the reaction energy (caused by the vinegar catalys which destroys the baking soda enzymes) is extinguished due to the higher concentration of baking soda.