Bluefin is stuff imported from China (According to SupplyHouse). I don't know if its good or bad. I think they are okay for things like plastic clamps. I just don't know if I can trust them on the important stuff.
I think Bluefin is using a lesser quality brass than the bigger companies. It may work, but the risk is there.
Its hard to find anything about these companies and what materials they use. On the other hand, I can call Viega or Uponor and ask them what quality brass and whatever else I want to know. Bluefin doesn't even have a website, at least not one I can find.
I am doing the same thing you are. Researching who to go with, what to use, etc.
What I have learned is pick a big reliable name and stick with them.
Uponor gets really high marks. They use Pex-A with the expansion fitting system.
Viega seems good, too. That's who I am going with for my place. They use Pex-B, and use a few different fitting methods.
(I would have gone Uponor, but I don't have a supplier close to me. My project is also fairly small.)
With the way pex is typically run, you don't really end up needing very many fittings. The extra cost is worth it for piece of mind.
Poor plastic will crack, poor brass can corrode, poor clamps will loosen or break.
I guess my point is this, you can't tell if something is good or bad until it breaks. So the only thing you can do is put trust in who is making it.