To address the OP's questions...
A) Cowboy has changed quite a bit in the last year. It used to be pretty awful, but now is much better. Try it and see if you like it.
B) Wicked Good is one of the most praised and respected brands out there. I've not personally used it, but I have used all natural briquettes from Stubbs (which I believe is a similar product) and can attest to the fact that it burns hotter than Kingsford, burns about twice as long and produces significantly less ash. By the same token, good quality lump will burn even hotter yet and with even lower ash, but for about half as long as natural briquettes, roughly the same burn time as Kingsford. (this has been my experience, your results will vary)
It sounds to me like you have (or had) a bag of Cowboy lump and a bag of Wicked good briqs in your possession. I think the only real answer is to do a cook with each, compare and contrast and then post your detailed analysis here for the benefit of all of us. With Q-view of course.