RE: Official Thread for the Go 21 Engine
brontal
The Go21 7port and Vspec have similar but different powerbands.
My experience between the two is basically for me the Go is smoother thjan the Vspec. The GO also has a higher topend. The transition from low to mid on the GO is sooner and smoother whereas the Vspec has a more explosive transition.
Its still personal preference. The GO definitley beats the Vspec hands down with lifespan.