I’m not sure the two are even trying to answer the same question. Lee tells you nothing about what your saddle height or fore-aft position should be, for instance, whereas these two measurements are core to most bike fitting (at least the ones I’ve had). This is because what Lee is ultimately after is maximizing your ability to stand on the pedals and make angles with the bike to suit the terrain. It’s about whether you can manipulate the bike fully, not whether you can pedal it efficiently while in the saddle.
(Note that the above is based on his online material, which I presume is what’s in the “Dialed” book, but I can’t confirm that since I don’t have the book.)