Unless you shoot fast moving objects with flash on a regular basis, you might not be aware that a strobes "flash duration" has a huge affect on an image's total sharpness. Flash duration is simply the time at which your flash is emitting light. Technical gurus will break it down into T.1 and T.5 times but for simplicity the longer the flash duration, the more your strobe light acts as a constant light for extremely fast moving objects (great article here). Recently Broncolor did a test between their Broncolor Scoro power pack and the Profoto Pro 8 Air to see which one had a faster duration. As biased as it might appear, I think it's fair to say that the Scoro does produce a sharper image especially since you can digital select the flash duration on the power packs themselves. The Broncolor packs do cost about 20% more than the Profoto packs so unless you are shooting extremely fast moving objects then you probably won't ever notice the difference. I think it could be interesting to throw something much cheaper into the mix like an Alien Bee but my suspicion is it might fail the color accuracy part of this test.