Agreed, Octane was good as far as benchmarks go but you have to balance with a much larger set of benchmarks and always ground your work in real-world scenarios (something we focused heavily on from day one e.g. when we realized having an interpreter really helps startup on lots of real-world apps but doesn't do much for Octane score).
That said, FWIW I think Edge/Chakra gets the crown on Windows!
(I work on Chakra)