A few points:
There's a slew of studies proving (definitively) that the Katana is by FAR the best bladed weapon PERIOD.
The difference in effectiveness between a Katana and ANY European weapon as well as the Jian was so enormous that the study creators were shocked the latter nations knew how to create swords at all.
The technical specs are not at all complicated; essentially, the Katana takes a lot more work to make and is correspondingly sharper and stronger for less weight.
As an example, 1 katana swung at 1 claymore causes the claymore to snap in half. Similar results for katana vs ANY sword (including broadswords, rapiers etc.). It's not cutting the opposing sword in half per se, but rather the extreme impact causes the sword to bend at a very severe angle, resulting in a snap. Jian didn't snap, but they were inferior in all cutting and range tests. Rapiers were bottom of the barrel as far as weapon effectiveness went.
Longer weapons (claymore etc.) are meant to be used on horseback, so the results were neither here nor there in direct comparison to the katana, although it is still hilarious that the katana snaps the claymore and not the reverse.
Finally, please note that armor + axe/mace > sword user. No bladed weapon can punch through steel armor with chain underneath. No arrows can punch through steel plate. Nothing piercing punches through; that's why macemen dominated the later infantry formations.
Go and download fight science lab for some interesting and well done demonstrations comparing swords, and fighting styles (ignore the ninjistu crap, that was unscientific and clearly done for the anime freaks).
Basically, in real life, most of Chinese martial arts suck, and Muay Thai kicks butt. This has been verified again and again in MMA, with most good strikers picking Muay Thai. Maybe Cung Le will show off Sanshou (which is very very different from Wushu), but mostly Chinese MMA is pretty and ridiculously low powered.
Martial arts in Wuxia, on the other hand, can take out armies of katana wielding samurai. Yay!