The late SVT calipers are the same as the ones you now have on the car. You need the late brackets to use them with the SVT rotors, or the same brackets you have now for use with the 260 mm rotors.
The early SVT calipers use a unique caliper bracket. If you use the early SVT calipers you will need to also use the early SVT brackets and the SVT rotors.
So if they are the late SVT calipers, there is no advantage to changing to them, but the pads would work with what you have now.
I hope that helped.
