Lambda's 3C beats Haku's at the max range. Or at least at the starting round distance.
Well, not so much beats, but that it has a longer reach if you're not spaced properly.
Actually, now that I think about it, it might beat it because her hitbox retracts during the beginning of the move, causing 3C to miss. I've certainly been hit out of it a lot when both of us went for 3C at the start of the round even though Haku's 3C is supposed to be faster.