I have both reels and I have to say that I find the 400D to be the most uncomfortable baitcasting reel that I own when it comes to palming the reel. It's so undersized on the palming side that my fairly large hand envelopes too much of the reel. The whole reel seems so off balanced on the rod. I actually find the 400B to be a far more comfortable reel to use. Maybe I'm just not used to the 400D. It is a smooth reel, and the handle design and outside star drag are nice enough, but that's about it from what I can see. I can't really notice much difference in casting distance when using lures weighing an ounce or more. And I didn't think that I would care, but having to remove three slotted screws to adjust the casting brakes seems odd for a reel that costs that much. Anyone else kinda scratching their heads about the 400D?