I've just taken delivery of my S60. Love it. However, looking at my order it states "Tesla black premium seats". On my final invoice it states "black next generation seats". The premium seats look solid leather. Mine are leather but they are vented (lots of dotted holes". My seats are hot and cold vented. I also have adjustable headrests. Question is, why are my premium seats now next generation? Which are better? Which are more expensive? UK model. The next generation seats don't appear on the UK website anymore.