Maybe the difference is that fan sees the value of the thing, while consoomer sees the value of the process of consoomation? While the first one is a hobby, the second is kind of mental disorder, when even if the thing is shitty piece of shit you need to BUY it and when it's yours you stop caring. In general you can always distinguish a fan from the consoomer by how he stores his belongings. A collector values his collection, usually it is orderly put and even if the he doesn't have enough space, it still looks OK. But with consoomer it's like everything is fuck knows where.