I like the look of the high end leather interiors better, but thinking about how well a fine suit feels, I suspect I'd prefer owning the wool interior. I wonder how they wear in comparison?
I'm guessing just fine.
I'm sure you own high quality merino garments. They seem to last forever.
Dude - just.... no.
First, people don't wear the same woolen garment daily for 5 or 10 years. If they did - how well do you think the garment would hold up? Well short of forever?
Second, wool does NOT do well in two areas: 1) stretching (check the elbows of a well worn suit - it's why suede elbow patches are a thing) and abrasion (even the best quality wool trousers will wear at the crotch where the fabric gathers - it's why many higher end suits come with the option of a second pair of trousers).
Now how this translates to wear on woolen seats I can't say - but the material itself is not uniquely well suited (pardon the pun) to resist wear over time. Show me a 10 year old LS340 with a leather interior and one of the same age in fuzzy wool and I know which one I would be betting on to show less wear.
I have no idea what the precise blend is. I'd have to guess that Toyota considered some of the shortcomings when they made their blend, because of their attention to detail in this car. Also, the wear on a pressure point like an elbow or crotch is different than the large area where your posterior sits on the seat, or the seat back. Have you worn out the bum or back on many of your suits...arguably the part that comes into the most contact (via sitting) on a daily basis? Remember too that these cars were for VIPs and not your typical daily driver car. So what...maybe 1hrs use per day or less?
But what I do know is I HAVE seen Centuries twice before at JDM car shows. Might have been the same car for all I know.
And the interiors were just fine. Which is why I said what I said.
Fun tidbit: one of the Supra tuning shops I frequented had one of the Century V12 engines before and were going to try and figure out how to put it in a Supra.