I'm not sure, I think there is some connection between the two (in the past it appeared as if FF/CCC outages are related, but I could be mistaken), but I don't know what the overlap is (if any) between their networks / network operations. Their packages from the ISPs are also not always priced...
I've been wondering, currently I'm on CCC but Frogfoot is also available. Is Frogfoot more stable/quicker to resolve issues in general (in your experience)? Would it be worthwhile switching to them?