I use both per their schedule, with the exception of the Big bloom, which I use at half-strength. (organic soil, lockout problems at full strength)
Both are components of a three-part system. If you haven't seen their feeding schedule, I'd look it over:

Fox Farm Feeding Schedule

A month or two ago, I wrote and asked Fox Farms if the 3-part system had any micronutes, or if I needed to get some more elsewhere. They said yes, it has all you need. (no specifics provided, tho)
I've shot Fox Farms another e-mail this morning asking if the Big Bloom is the one that contains the micronutes...waiting for the reply.

Trinity...likely if one doesn't know the product or the subject matter, one should wait for those with the experience to chime-in. It can really mess-up another's grow if they were to blindly follow bad info from someone pretending to know.
A) Big Bloom has nitrogen.
B) It's part of a 3-part system, designed to compliment each other throughout the grow.
C) If you remove one component, how do you know which nutes, metals or micro's you'll need to make-up for the loss?