The Elegant Rage vanquished the alien swordsman.
The Woodsap mech successfully managed to defeat an opponent that was previously objectively superior in every way that mattered. It did so by gaining an entirely new ability that had massive consequences.
Every observer of the ongoing lightning tribulation became amazed at how much more powerful the Woodsap mech had become!
In terms of performance, the Elegant Rage still performed like a well-made second-class mech in most aspects. Her parts did not mysteriously increase the strength, speed or even the defenses of her cybernetic mech frame.
The mech pilot also did not become a lot more skilled and capable. The intense duel may have polished his fighting skills to an extent, but Simon Jankowski never managed to outfight the alien swordsman that obviously dedicated a lot more time and effort in advancing his swordsmanship.