Here’s one comparison,
QCC700: 10 miles, conditions: flat with some shallows, negligible wind. Time: 1 hour 28 minutes, pace 8:48 min. per mile.
Westside Boat Shop EFT: same course, virtually same conditions. Time: 1 hour 21 minutes, pace: 8:06 min. per mile.
Done within two weeks of each other so conditioning is very similar. Only major difference would be as Greyak stated,, I am able to apply a bit more power into the QCC stroke as I am not 100% comfortable in the EFT yet. Would calculate 90 to 95% efficient in the EFT in comparison to QCC. Sorry I don't have more data such as that provided by heart monitor and GPS,, I try not to "overgadget" myself and focus on just pushing hard.
HEX