Well, no doubts any more, we went for the Multi-Pattern Standard Seats without real life comparison. One one hand we never liked leather seats for the before mentioned reasons, on the other hand the costs for the NextGen Seats clearly spoke against them (had to keep the total price below a certain limit to still get import tax refund, a freak *sugar* regulation here in my country).However, we've found the multi-pattern seats are hard and uncomfortable. We went back to the Tesla store and sat again in the next gen seats. We didn't spend much time in them, but they were much more comfortable than the cloth seats.
@wdolson, you must be the first with the opinion that the standard seats are hard and uncomfortable. Is it that you think they are really "hard" or "firm"? Because one can easily be deceived by the first "showroom" impression, however it's the long term sitting comfort that counts, and that's usually not the soft sink-in feeling supposedly luxurious upholstering provides.