First come, first serve!
Attack: Rin, see above.
Durability: See Attack.
Lifting Strength: Rin, K is better than Skull Knights 5.
Stamina: Skull Knight, has stamina so high, it is possibly even limitless, which is better than that of Rins.
Range: Skull Knight, Goes up to Dozens of Kilometers, much better than Rins hundreds of meters range.
Intelligence: Presumed equal, as both are very well skilled in their respective ways.
Experience: Skull Knight, Rin being 26 years old cant really compare to Skull Knight, whos lives several hundreds of years old. After all, Rin relies too much on stealth more than fighting.
Abilities: I gotta say Skull Knight, but its very close. Skull Knight has one thing that would be the key to his victory: the Sword of Resonance, which cuts space (Space Manipulation), and that would mean that Skull Knight would have to be pretty far away out of Rins range so he can slowly chip her to death. True, Rins got good stealth, and pretty versatile abilities, especially being able to minimize her damage taken via her Shinobi Barriers, but it goes without saying: she cant hide forever, as Skull Knight will find her and finish her off.
Conclusion: Rin, despite being a tough nut to crack due to her better attack, durability, and lifting strength, pretty much gets outranged by the knight, not to mention, she can tire out unlike Skull Knight, so this could go on for days until she is tired, giving Skull Knight the opportunity to kill her. Plus, with more experience, thats simply much better, a key reason of Skull Knights victory. The winner is Skull Knight, 4-3.
