I think that, at a minimum, if you're going to describe your thing as "like X, but Y", then you should have a link to a description of X (especially if X is a generic, non-Googleable term), or, better, an independent description for people who are interested in finding out what your thing is but don't necessarily care about X. Otherwise, people who know nothing about X end up clicking through, finding nothing helpful, and now they still don't know what X is, and they don't know what your thing is, either.