Apples to Oranges
Apples to Oranges is an idiom commonly used to highlight the obvious differences between items that cannot be compared with each other. In common usage, it refers to a situation where someone is trying to deduce similarities between two dissimilar objects, items, metrics, processes, situations etc. by comparing one with the other.
Applause for all the respondents- R Rajesh, Manjeet Sachdeva, Vijaya Mohan K.