With so much of what we do coming from hosted providers, redundant Internet providers is a must. Yeah, it costs more, but how much would it cost to have to send all the staff home because they can't work.
Like DJ's military base analogy, I always make sure that the Internet comes from different sources, otherwise it's not redundant.
Here's my two questions:
1. who is the last mile provider?
2. who is the underlying carrier?
If they both use, say Frontier, as the last mile provider or if my data is going to be travelling to Atlanta (everything in Florida goes through Atlanta) all on the same fiber then it's not redundant.