The triple black seat on the GS are excellent and they are actually BMW’s exclusive seat which is supposedly one better than the optional ‘comfort’ seat that you can get as an upgrade for a standard GS.
I found my Triple Black Seats so good on my last bike (2017), that I swopped them onto my latest 2018 bike which I’d ordered with comfort seats. I gave the brand new comfort Seats back to the dealer in exchange for the old exclusive Seats from my TB.
My be worth a try if you can find a dealer with a second hand TB in stock who’ll let you borrow the seats for a test ride.
I took the standard comfort/exclusive seats of my Triple Black GS because I thought they were bloody awful
I replace them with Triple Black GSA seats