Thank you for the link. Was looking at this. But I don't believe it states which button / input names are changed.
And I'm still digging into this... but I think some button names have just been out and out swapped. So 'Button 8' may have changed from being start to right analog btn. Not sure though.
I get the impression it is only causing me headaches tho, so that's good. Doesn't seem to have confused many other devs