Sintering has nothing to do with whether a pad should be used or not. It is the material contained in the pad.
It is if the pad is metallic of not that matters.
However, I am pretty sure these brakes were originally organic.
If anything, since rotors are hard to get for these bikes, I would stick with organic for extended life, especially since you have dual rotors anyways. I would toss on some braided lines if you need additional braking power.
The ride IS the adventure. The destination is just to get gas!