Three different characters with the same style and same smile DF. He is just recycling..Clearly, Oda likes that style and smile DF.
If Oda wanted those three to be the same characters he would have made everything about them identical. The one Zoro fought had a tattoo on his chest and was using all swords. The one Yamato is facing uses a sword and gun. He is also missing the chest tattoos. The gun wouldn't have covered up all of the tattoo.