Kobo Aura H2O CPU

Many Aura H2O reviews tell that H2O has a Cortex A9 cpu (instead Aura HD has a Cortex A8)

Is it right or a refuse in the review ?

Since also some Aura HD reviews tell that HD has a Cortex A9 (which is wrong), I suspect that HD and H2O have the same identical Soc, but I search a confirmation or not