Specious would be a great analogy to the word I'm looking for. It is something that it is true on the surface but really is not, i.e. superficially familiar, but not if we look closely.
Mushrooms resemble plants, they are _____ to plants, they look like plants and consumed as vegetables. However, if look deeper they are completely different living organisms.
The word would represent a thing to be "familiar", "relatable", "recognizable". (Not necessarily physically familiar). Yet, it would also convey the thing to be "alien", "unrelatable", "different".