RK3399 processor found in the faster of the android headunits vs the PX6 processor also found in very similar specified android headunits. Usually with 4Gb RAM and 64Gb ROM they are both modern SoC devices ideally suited to running Android.
There is no contest between the PX6 and the RK3399 because they can be considered to be exactly the same thing.
Both have the same dual-core Cortex A72 processors and a quad-core Cortex A53 processor making them a ‘hexacore’ processor – but often incorrectly described as ‘octa-core’ in the sales pitch (8 cores sounds better than 6 cores), which is just misleading.
As far as everything goes the RK3399 is a bit of a mouthful and PX6 is much easier to remember in the minds of headunit buying customers.
You can find out about the PX6 processor SoC system found in android headunits by reading our post on the RK3399 SoC.