Until people get underneath them and post part numbers to compare, it's all a bit speculative and woolly. We know there are a number of revised parts numbers that customers have been offered in the states for the rears, but nothing solid in RHD cars (apart from the difference between LR and P).
Funny one too because those who were happy with their suspension from the off don't care, but I'd imagine those who were not happy or still aren't - might be banging on the SC door asking for a retrofit.
I'm in the former camp but I'm just interested what changes they're making and why. I'd be happy to set up a spreadsheet or doc if people want to give their build date and suspension part numbers so we can compare any real differences and see if there is some consistency.