Well i can't compare it to the stock cage because when i bought the bike one of the reeds had a chip missing about the size of a thumb nail, which i discovered after the first ride. However i can tell you that the vforce cage will theoretically allow much more flow because it has 4 reeds instead of two. I'm assuming its like a four stroke having more valves.
As for the first ride with the 200 fully functioning with the vforce reeds, the motor is pretty awesome, it has excellent mid range. The only issues i would have are when going up a hill once the power started to come in, the rear tire would light up. I later figured out that i was running way too much air in the rear for mud but i only remembered to check once i was back from the ride.