I can't comment on which is best, as I've only owned one (and no doubt, most people are in the same boat), so all I can say is that my Blichmann works fantastically. Also comes with a useful mounting bracket, and was a cinch to put my quick disconnect fittings on.
I made my own back-flush hose though. It's cheaper and far more customizable that way, working in whatever configuration you want instead of just their fittings. For instance, I use a 5-foot hose with a female garden hose adapter on one end, and a quick disconnect on the other. The length and fitting configuration allows me to connect it straight to a wort port and bypass the entire water part of the chiller, while also still being able to attach it from the water-out to both the wort-in and wort-out. It's also the same hose I use to fill my HLT, so technically it was a non-cost. Although to fill the HLT, I guess many people fill it from the top without needing any fittings on the HLT side, but in that case, sticking a fitting on that hose is still much cheaper AND better than buying their 18" backflush hose.