I've shared this on the D8000 thread but will say it here too.
I've never heard the regular D8K, but Having owned the D8K pro for a long time and the LE over a month,
I can say at 100% that LE and the regular Pro are not the same exact headphone. I spent a lot hours A/Bing to be sure of that.
Not only the new pads slightly change the tuning, but the driver damping must have changed too. I know this cause I swapped the pads and the LE with the pro pads doesn't sound like the regular pro at all, it sounded bassier and warmer. In the other hand, the regular pro with the LE washi pads, sounded bass light and brighter. This means that the driver of the LE has been tuned to match the new washi pads, which makes total sense.
That said, the sound profile of both is really close. Id say that both have almost the same bass quantity, the main differences are in the highs, where the LE sounds a bit more relaxed and "natural" to my ears. The LE also has a better spacial presentation overall.
PD. A pic of these 2 beauties.