The wording can be a little confusing, because i believe in tor when people talk about censorship resistance they mean censorship of the whole network - e.g. blocking all the entry nodes, trying to find bridges and blocking them, which is a different type of censorship. I imagine freenet is just as vulnerable to that, and i would imagine that is an easier thing for powerful entities to do than to push GB of data into the tor network for an extended period of time to hopefully knock out a single hidden service.