Board Thread:General Discussion/@comment-25266931-20170224140119/@comment-26397825-20170228063530

They said in a commentary that the reason Weiss has multiple dusts in the one sword is because she looked at winters two swords and two dust types and went "Oh yeah? I can do it better."

Qrow has three fighting style technically - sword, scythe and shotgun. He can interchange these however he likes due to his mastery of them. It's all one fighting style overall, but it's three different styles blended into one very versatile technique.

Winter has two - her sword play and her Mage style fighting using dust and her semblance. Her semblance which summons Grimm, which Qrow has been fighting for decades now and has the experience to take out quickly and without being taxed. So even the major part of her semblance doesn't actually phase him that much.

Then her swordplay is easily counteracted by Qrow's swordplay. He has an actual gun, which counteracts any ranged attacks she may make with dust.

And then he has his scythe, which is an unusual weapon that few people have. If he'd pulled it out, he would have swept the floor with her because of surprise and then unconventional tactics. Even if it's slow, he can switch between his scythe and sword to counteract her swordplay and mix things up with the pole arm.