The price elasticity of demand for coke is > than the price elasticity of demand for soft drinks because there are different types of soft drinks a consumer can choose from. In other words there is a greater number of substitutes for coke. On the other hand, there are no substitutes for soft drinks in general; therefore no alternatives in which a consumer can choose from.
Why Is The Price Elasticity Of Demand For Coca-Cola Greater Than Price Elasticity Of Demand For Soft Drinks Generally?
There are several different factors on your question.....one is demand for a product and its location to the distributor and also take into account advertising....some brands are more popular for those reasons...not to mention other factors that could be involved...like...thats what they are used to drinking ( some people or regions are not easily susceptible to change.)