What's the difference between the two designs? I'm looking to replace my oem reed set up... Which is better?

 The only info we talked about was that the newly designed VF3 flows as well as the VF2 and that they had not tested it on the dyno for the LT500. I am sure if you call the number he would be able to tell you more. I stuck with getting the VF2 based on the info from this site.