A battle between Tsuru and Tsuru? This is a battle more legendary than Roger and Garp's team up against Xebec. This battle is the battle that will pierce the heavens and shock the gods. But being real though, Queen got this. Tsuru was likely powerful in her prime, but I don't think its to the point she was admiral caliber or anywhere higher than that. She was likely commander caliber during her prime. But right now, I'd say she's around ordinary vice admiral caliber and Queen is stronger than any current vice admiral we've seen so far aside from Garp.