Interesting observation about higher cadences and lower max wattage. I would say it's fairly obvious for MAX wattage, given that a higher force on the pedal (low cadence) translates into more type II fibers being stimulated. They are certainly more powerful than slow-twitch (type I) fibers, and should give a higher peak value. They do fatigue much more quickly, though. For AVERAGE power, i.e. what one can continuously put out, it would make sense that a style utilizing more type I fibers, which are aerobic, would be more logical. and, some motor units can rest, while others are recruited each time. This isn't to say it's only one fiber type or the other or the other, it's always a mix.

Again, some of us have a lot more type I, or type IIA, or type IIx fibers (type IIb are present in rodents but in humans are mostly embryonic, very scarce in adulthood). This is not something you can really know, short of doing a muscle biopsy. But, it does influence what feels natural for you. Of course, over a long period of time, one can train the intermediate type (IIa) to act more like either I or IIx, but that is a whole other can of worms...