i'd trade to kgibson, his purpose, and yours would be better suited with the trade,
IMO, the cfm, if it includes the water deflector top piece, is better suited for on the trails and in muddy/wet conditions, the top piece aids in directing water and mud off to the sides of the filter, but doesnt effect airflow at all,
as for gibby, he prolly wants the added openness and larger tube for his track only riding and heavily modded blaster, but doesn't care about the wide open top ?????
all just my opinion of course, i'd do the trade