FYI "slots and holes" in rotors are not for cooling , but rather to allow the gas generated by the heating of the pads to escape and prevent the equivalent of an "
oil wedge" that restricts the pad's full surface contact with the rotor.
All pads "outgas" when heated, the binders and fillers get hot and produce gases. This is what causes "green fade" in new pads the first few times they are used hard, the outgassing is pressurized (think tea kettle) and keeps the pad from full contact with the rotor. Yes, rotor holes can and do increase cooling, but the amount is so small as to be insignificant.
In most street application the slots/holes are for the same purpose as yellow calipers.....the look.