No one has mentioned this, but I have learned from experience that if a particular 'brand' makes a disc, they normally have a matching pads... These disc are Galfer disc.. I'm pretty sure the compound is made for that disc material. I'm not saying other pads wont work or fit. But you might find that they squeak or don't stop nearly as well as the "stock pads".... I would bet'cha that Galfer has a specific pad material they use with there disc. They shove that "performance" off to Yamaha and hence the steep price.... Ive gone down this road many times with Metric bikes and Harley. Harley using the Brembo for many years now. Its best to get the 'matching' (and in this case - stock) pads... They (typically) will perform the best and last the longest... from 25+ years of experience...
My $.02 Find the best price on stock pads and load those in when you need them... Some after market pads can 'eat' a rotor, then you will need to buy a rotor when that happens... not good....... Been there..............
The backing plate might be the same as an R6 because the calliper is the same/similar but the pad material is not the same.. The R6 pad material would not be the best for the super tenere because of the differences in the weight of the bikes, HP, and braking distances and heat... Two different materials.. Yamaha probably brought Galfer on board for "stock" parts because the weight, braking distance that needed to be acheeved, with lots of dirt and water thrown in the mix.. Some pads hold up much better than others with very hot Temps, and on the other hand some pad materials hold up much better than others with dirt, mud, dirty water thrown on them.. With todays bikes its certainly not a 'one shoe fits all' deal... Ive tried to use EBC and the rest over the years... IMOP, its just worth getting stock pads for a normal bike / normal rider, Etc....... If you have a GP bike with $10K brakes... you need special pads... LOL