Bell's more expensive and somewhat road-inspired Sweep is an out and out racer with its styling, looks and feel, and it has an adjustable rattle-free peak like the all-mountain lids if that's your bag.
The shell has 20 large vents with deep channelling for the air to flow, but this is offset with an internal skeleton frame that makes sure that strength is retained. It has the all-mountain inspired inmold wrap throughout but as a trade off, the Sweep isn't super light for a racing lid. The retention and fit are more than worthy of a helmet at this price point, though.