CHIP vs CHIP Pro

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CHIP CHIP Pro
SOC Allwinner R8 NextThing Co GR8
Clock Speed 1 GHz 1 GHz
Storage 4GB NAND (SLC Mode) / 8GB NAND (MLC Mode) 512MB NAND
RAM 512MB 256MB
WiFi B/G/N 2.4GHz (Realtek RTL8723BS) B/G/N 2.4GHz (Realtex RTL8723DS)
Bluetooth 4.0 4.2
I2S Audio No Yes
Dip Support Yes No
Expanded GPIO 8 Pins 0 Pins
PWM 1 Pin 2 Pins
ADC 1 Pin (6bit Resolution) 1 Pin (6bit Resolution)
Connectors
   TRRS Port (Composite Video and Audio OR Mic In)
   microUSB (Power, OTG)
   USB2.0
   Battery (JP2)
microUSB (Power, OTG?)