I've been doing some research, and a lot of websites claim vegetable tanned ages better.
But I think this academic paper* shows conclusively that chrome tanned lasts longer, specifically they measured the longevity of leather soles.
I'm planning to upholster a motorcycle seat, and I want to go with the most durable natural leather finish, i.e., no painted surface.
I like the patina on veg tan, but it might look weird to have the butt contact area significantly darker than the rest of the seat.
Thoughts?
*COMPARATIVE WEAR OF CHROME~TANNED, VEGETABLE~TANNED, AND RETANNED SOLE LEATHER https://nvlpubs.nist.gov/nistpubs/jres/15/jresv15n4p363_A1b.pdf