Technical difference between DualShock 4 Controller v1 and v2?

[misthalu]

There are many threads here and there about the differences between the two DualShock 4 versions, but none about the technical differences, which is what I'm curious about.

More specifically: What is it that makes the DualShock 4 v1 work on a lot of Sony Blu-ray players and TVs - while the DualShock 4 v2 doesn't work on the same devices. What is the technical difference that renders v2 useless in that scenario?

Does anyone know?

Source: https://www.sony.com/electronics/support/home-video-blu-ray-disc-players-recorders/bdp-s3700/articles/S1Q0513

 

[PSXHAX]

I posted a few links HERE, perhaps someone like DS4User would be able to answer that... the only thing that comes to mind is the higher PS4 Firmware requirement for the v2.