It's hard to tell. Both are tough and skilled. Both are pretty different then anything they fought. With how versatile her magic is she has mobility and range. Brute force, and wild card of Haki to Zoro.
First thought, I was all Ezra, but I'm starting to lean to Zoro. Both tend to either tear people apart with ease, or take massive damage and then a all or nothing attack to win. But Zoro tends to fight people like him, just a level higher and win, Ezra opponents tend to hold her back and keep her from striking until the end. That might give him an advantage.