Why don't you take the circumstantial feats that either character performed? Absalom did jack shit and hid behind his guns and invisibility power. Sanji played around with him the entire time and only got stabbed to not let Nami's "Image" get tainted.
Ryuuma did Brook's fencing maneuver's on crack basically, poking air holes in walls, slicing buildings in half, all while giving Zoro a moderately hard time as a shadow.
Really guys, there was a clear difference with how Oda presented it. The only reason why Absalom "commanded" Ryuuma was because he was a shadow controlled Zombie. Moria commanded Oars, and very clearly, Oars was stronger than Moria. That is a fact.
Edit: Technically, fucking Perona was stronger than all of them, and Usopp handled her. Usopp is the strongest.