People who want to find fault will always find fault, and vice versa.
@telegraham does a good job cutting through the marketing BS, though, and open air PAR testing/mapping is as true an "apples-to-apples" comparison as you can get.
To be honest, I am all about the Quanta bars. I was a beta tester for Luxdium on their LED pucks, so I appreciate what Quanta has from a spectrum standpoint (Luxdium and Quanta are leaps and bounds ahead of everyone else on the spectrum front). I'm also a HUGE fan of strip lights or, maybe it's more accurate to say that I absolutely HATE shadowing. But, what I can't get past is any kind of control for the Quanta bars beyond on/of with a timer.
The reality is that my tanks are in living areas of my house, so I can't "just raise them higher". I would also run more bars than I would need for my PAR requirements so that I could mix and match to get the spectrum I wanted. With Quanta there's no options for dimming. I'm not saying they need a full blown app or anything, but a way to dim the bars (even a third party option and/or addon for additional cost) would be a game changer for me, and I'd eagerly snatch up a pile of the bars.
The thing that is really drawing me towards the Blade is the ability to control/dim them, honestly. I'd get the coverage at a lower mounting height AND a way to turn them down. Win-win. I'm holding off for a while to see if the spectrum (Grow, Glow or some combination of both) would get me where I want to be.