vtec e operates differently than regular vtec. a vx only has 2 cam lobes, as opposed to the normal 3. one lobe is a normal size, and one is almost perfectly round, and only opens enough to keep fuel from pooling on the backside of the valve. this makes all the airflow at low rpm and light throttle flow through one intake valve, creading lots of turbulance, which improves fuel mixing. this is what allows the vtec-e motor to run with a stratified charge- a very very lean a/f ratio. after 2500rpm or with more throttle, the single valve isnt enough, and a stoichiometric a/f ratio is needed to prevent detonation. so at 2500 rpm or with heavy throttle, vtec engages a pin in the follower to make both valves follow the larger lobe. theres no high rpm kick, no difference in sound, etc. thats all in your head.