They are close, Porsche's own figures confirm this, but I think that misses the point. The initial change to an F4T engine was not motivated by performance gains, likewise the change back to an NA engine for the GTS in the guise of the new 4.0, was also not motivated by performance gains. Both the 718 GTS 2.5 and the 718 GTS 4.0 are still GTS models and their performance is benchmarked accordingly.This is just another review that trashes the F4T for no good reason. I went through their video history and they’ve never even driven the F4T! When are we going to start seeing brave reviewers like these run a GTS vs the new GTS 4.0?
I would even want to see a GTS vs the new GT4. Aside from a track and the noise, I bet they are a lot closer than people think. And their chief complaint about the GT4 - the gearing works much better with the more torqued F4T.