What is your average MPG with the PCV?
For 20 more dollars, I would go for the ignition timing capabilities. Gas adjustment is great, but ignition curves make a world of difference on any machine, in my experience. A good pipe should respond well to ignition adjustments as well. Furthermore, powerband smoothing can be achieved, when the stock, overly conservative ignition curve is replaced.
My guess is the added Ignition adjustability will add performance while retaining MPG if done right.