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I still think the Ecotec is a better motor overall, The perfect example was Hozy's VN with the ecotec transplant, Way quicker than any other full weight v6 commodore with only exhaust. I believe it was also later tuned by Dr Bob running the stock vn Delco ecu.
Here's the vid YouTube - VN Commodore with ecotec transplant
your talking as if a s1 will absolutely eat a s2 and is in a class of its own?? they are a bit jumpier off the mark thats about it..
Yeah in a race a stock VN S1 vs stock VP the VN is slightly quicker off the mark, that's all. The VP has a better top end thanks to the longer duration cam and better exhaust manifolds, combined with the weaker tune that puts them about even on the top end
Also the VP motor has longer runners on the manifold.