Not all rotors are created equal, I learned this quickly when I started riding a tandem mtb.
I went through a number of rotors until I found one I liked, its a Hope Floating rotor; not the mini or saw blade.
FYI: The Ice rotors have been known to melt, the center of the “sandwhich” is aluminum which overheats, so be aware of this before dropping the coins.
Tandems are great brake testing grounds 