C-5, C-7 and C-8 all are based on Amlogic A113X SOC. C-8 Pro has A113X2.
Notes about hardware revs:
C-5 has 500 series Z-Wave module, single frequency for US, and Zigbee 1.2 chip. Other Z-Wave regions need an external dongle.
C-7 has 700 series Z-Wave module covering all regions through settings, and Zigbee 1.2 chip.
C-8 and C-8 Pro have 800 series Z-Wave module covering all regions, and Zigbee 3.0 chip, with external antennas.
C-5, C-7 and C-8 all have 1GB RAM and 1.416 GHz CPU clock for ARM Cortex A-53 CPU.
C-8 Pro has 2 GB RAM and 2.016 GHz clock for ARM Cortex A-55 CPU.
It appears that C-8 Pro boot time is almost twice as fast as C-8 boot time. Other performance metrics are not available.
