Yeah it seems like he was about to attack Drake with the Tonfa but in the right moment when he was about to hit him Zoro come into game>overpowered his attack and cut him easily down, because that his right hand is in front of him and not behind because Apoo was ready to attack Drake. I can´t say how the fight would going on but I think Drake as Zoan could win high-extrem high diff.
The different with Zoro is just that Zoro don´t need to go all out, while Drake would put anything to beat Apoo, Zoro did it in badass way, because that Drake was shocked of Zoro power, you don´t see everytime a supernova beeing shocked by someone else pl.
In that way Oda clearly portrayal Zoro above both Apoo and Drake, while Zoro soon fighting against Commanders, the two others(or at least Drake) facing a flyer. The gap between a commander and someone as Apoo is insane large, gonna be epic battle if Zoro fight either King or Queen.