What's his counter to Mu's flight and invisibility? And, just reminding, Jinton one shots.
Considering that He can through his Kunai up in the air near his oppoent flying or not and teleport there with them having no knowledge of his abilities I say he takes this. There is no such counter for FTG.
Both have similar hype and skill level. Mū can remain undetectable to Minato, however, because Minato has no special kekkei genkai or sensing to detect a flying enemy with. Mū also has an aerial advantage that will be hard for Minato to counter. If Mū weren't so smart, Minato could believably win, but Mū is incredible calculating and is also a sensor, which means when Minato evades Jinton with Hiraishin, Mū will know exactly where he went. So Mū takes this.
@MicroSword57, Mu has incredible reflexes. I don't think a kunai will get close enough to him for Minato to close in while Mu is invisible and flying around in the air.
While flying Muu does not stay at a constant motion or else he could not hold his Jinton this is proved in the Manga. Also Minato does not have to appear right on the Kunai but simply close to it this is also proved by the manga. Mu can sense the Kunai coming at him and dodge it yes but for minato to just appear from no where next to him right after he dodges a Kunai, not knowing Minatos abilities Mu will be suprised.