Draco is the better duelist at this point. Draco tired himself out by casting all those tough spells someone his age should not even be able to do, let alone do many times in a row. This was pointed out by Quirrel and Madame Bones, which makes it unlikely that it was just Draco rationalizing it.

Hermione is more magically powerful and also more clever, but when it comes to dueling, Draco still probably has the edge.