Ok so the results of the email are in ... I asked: "Hello, I would like to know what your product Rocket Fuel is made from? I have used your Seamungus before and would like to know how these two products differ in ingredients and purpose as the analysis of each seems quite similar."
and the first response I got was ...
Essentially Rocket Fuel was developed as a fruit and veg specific product in conjunction with the support for the Stephanie Alexander Kitchen Garden Foundation. Seamungus is more for natives, pre planting and a plant tonic.
digging a little deeper ... "Thanks Xxxxxx for your quick response. A further query: Your website states Seamungus is "Manufactured from fish, seaweed, humic acid and manure". I'm just wondering if Rocket Fuel is made from the same base ingredients? (couldn't see this on the website, product packaging or PDFs) or does it contain additional 'chemically boosted' fertilizers?"
and the first response ...
Yes Rocket Fuel is made with the same base ingredients and is an organic product
We've got a rep coming to our next meeting so I'll see what response I get face to face, but reading between the lines

it sounds like a case of same shari different packaging (and price)
Based on the info at hand, at half the price I'm going to give RF a bash and see how it goes ...
What do you think Steve?