Roronoa Zoro is a powerful swordsman, being able to use one, two, and three swords in varying attack styles, going from melee-type all the way to artillery. He is able to use some sword techniques that utilize the air itself to strike the enemy from a distance
Afro Samurai is a Highly skilled swordsman. He can use his subconscious mind to create completely new combat techniques in the middle of battle. Afro normally fights with his sword in one hand but when facing stronger opponents or higher numbers he will use two hands for a stronger attack.
Who do you think would win?
Rorenor Zoro (c) Eiichiro Oda
Afro Samurai (c) Takashi Okazaki