So you're comparing the Venom 400 and a Jet chip?
The Jet V-Force is more liek the Venom 400.
Here's some reviews on the Venom 400
http://www.carreview.com/pscParts/En...0_2874crx.aspx
It looks like its a mixed review. Some like it, some don't.
The Jet V-Force has an ON/OFF switch as well.
http://www.jetchip.com/imports/vforce.cfm