Hi,
I suspect, but only guessing, that the software algorithms that control the distribution of torque between the ice and electric motors have been tweaked. I have yet to experience the instant max torque of an EV of any kind, but must be a big part of their appeal.
Apart from the double glazed side windows, the Korean reviewer above also mentions increased sound deadening elsewhere. Seems like a major update overall and so well equipped in ultimate trim, the AP seems reasonable compared to other Phev. Two questions remain. Is the boot big enough and can I talk the good lady into plugging it in for me?