Amlogic S905X2 vs S905Y2, what’s the difference? which is better and faster?

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Amlogic S905X2 is new chipset of Amlogic Series. Amlogic S905X2 features USB3.0 or PCIE2.0 and HDMI 2.1: 4Kx2K@75pfs  as well WiFi 2T2R and Bluetooth 5.0 connectivity..

* USB3.0/PCIE2.0 (PCIE or USB3.0 with multiplexed IO)
* Enhanced 8-ch I2S interface
* HDMI 2.1: 4Kx2K@75fps 
* Support multi-video decoder up to 4Kx2K@60fps+1x1080P@60fps (Better video decoder than S905X/S912)
* H.265/H.264 video encoding up to 1080P@60fps with low latency
* Build-in Cortex-M4 core for always on processing
* Build-in Cortex-M3 core for system control processing(S905X/S912 also feature with this)
* Support LPDDR4@3200
* Amlogic S905X2 buildin 100M PHY and 1000M MAC
Amlogic S905X2

Amlogic S905X2 has a NEW thing compared with S905X: it support for USB 3.0 and HDMI 2.1 (in theory capable of supporting up to 10K resolutions), although  HDMI 2.1 is not a practicla point at this moment.

To be simple, Amlogic S905X2 has USB 3.0 while Amlogic S905X has USB 2.0 only.

However, Amlogic S905Y2 is also a CPU featuring USB3.0 or PCIE2.0 and HDMI 2.1: 4Kx2K@75pfs.
Amlogic S905Y2
We carefully studied the datasheet from Amlogic and found no big difference between these two chipsets, which means Amlogic S905X2 = S905Y2.

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NO.1
Gearbest Mecool M8S PRO L 4K TV Box Amlogic S912 Bluetooth 4.1 + HS  -  VOICE REMOTE CONTROL ( 3GB RAM + 16GB ROM )
Mecool M8S PRO L 4K TV Box Amlogic S912 Bluetooth 4.1 + HS - VOICE REMOTE CONTROL ( 3GB RAM + 16GB ROM )


NO.2
Gearbest A95X PLUS TV Box (Amlogic S905Y2, 4+32GB, USB 3.0)
A95X PLUS TV Box (Amlogic S905Y2, 4+32GB, USB 3.0)

NO.3
Alfawise H96 Pro+ TV Box
Alfawise H96 Pro+ TV Box (Amlogic S912, 3 + 32GB)