If I could only have one, I guess I would go with B.
But, I have both so I get the best of both worlds.
B is good for putting snow on your neighbors roof. But it can clog.
But A looks awesome even when it's not moving. One thing I will say is that the LI with GRWs moves so slow, that I've never clogged it up. And that includes some slushy snow that came out on cubes.
But, as I've said before, if your house is on fire and you need to clear the drive so the fire truck can get in, then A is NOT the blower you want use.