The "accepted parameters" are just the result of dominant religions.Again I'd argue it's more than that. As I understand it cults require a strong rejection of the culturally accepted parameters of religion, just not completely enough to include the trappings or usually the basic framework, whereas religions are more or less compatible with culturally accepted norms even if that compatibility is sometimes a bit strained. I'd argue that's a pretty fundamental difference. But none of that really matters to the issue at hand unless delusional is close enough to superstitious to more or less equate the two in the context of the OP. They are to my mind (I think), but I'm not the marshal of the discussion.
Naturally, upstarts will differ.
Fundamentally, they're both similar, eg, beliefs about the supernatural, grouping together, rituals, morality.