Originally Posted by Randy_Pike

The RX pack isn't going to back feed and give the motor more power.

I feel it's faster only because it will prevent ANY power from being taken away from the motor. If you run a booster there is a small amount of power being used for the receiver and servo, while minor it's a difference especially in mod where they're pushing it as it is.

If I had the choice I'd go rx pack simply to keep my servo and receiver at a higher voltage for optimal performance.