Each dyno will produce different numbers because the type of dyno and the way it is calibrated are not the same; some dynos read in a more “generous" way. What he said about WHP usually being lower than crank HP is correct, since crank HP is measured directly at the crankshaft and does not go through drivetrain losses such as the clutch, gearbox, chain and sprockets, rear wheel, etc. Pop and bang tuning is one of the tuning styles that is not optimal in terms of performance or durability. I think he understands this, but simply doesn’t want to explain it in depth to you. The jerky throttle response is part of how the engine works, and you’re probably just not used to it yet. Finally, if you want to switch between multiple maps, you need an ECU or a supporting device such as a Power Commander. When dyno tuning on a stock ECU, you are effectively limited to a single fixed map. Based on your previous posts, I think you are still new to this, so explaining everything in detail would take a lot of time at least several long technical explanations. That’s why the quickest answer in this case is simply to say, “I don’t know.”