true. H22A has existed since 1993. and we have been able to exploit its capability and still.
but, I still prefer K-series. K-series are just new. introduced like 3-4 years ago. I don't think we have exploit the engine enough. just see how they modify the K-series in US. and, we are still way, way behind to fully exploit K-series capabilities.
new technologies define better performance.
I used H22A and F20B before. but, I still prefer K-series.