Why are the 11.75 Brake Better?

Great time to stumble on this old thread. Was wondering just which cars used the larger rotors and brackets. I get that the 78 fury, cordoba etc. used them so at least I have a direction to go. I'm converting manual drums from scratch on my 72 and did get the later model UCA's. Anybody have an opinion on which is better, sliders or pins and were the big brakes available in both styles?
For your first question, here's a list of cars that had the 11.75" rotors. It's just a list from a parts store, so, it may not be all inclusive or 100% accurate. Most were also available with the smaller brakes also so just finding one of these cars doesn't guarantee they had the large brakes either

CHRYSLER CORDOBA (1976 - 1979)
CHRYSLER NEW YORKER (1979 - 1981)
CHRYSLER NEWPORT (1979 - 1981)
DODGE CHARGER (1976 - 1978 )
DODGE CORONET (1975 - 1976)
DODGE MAGNUM 1979
DODGE MONACO (1977 - 1978 )
DODGE ST. REGIS (1979 - 1981)
PLYMOUTH FURY (1976 - 1978 )
PLYMOUTH FURY SALON (1977 - 1978 )
PLYMOUTH FURY SPORT (1977 - 1978 )
PLYMOUTH FURY SPORT SUBURBAN (1977 - 1978 )
PLYMOUTH FURY SUBURBAN (1977 - 1978 )
PLYMOUTH GRAN FURY (1980 - 1981)
PLYMOUTH GRAN FURY SALON 1980

Your best bet is DoctorDiff, he sells the 11.75" caliper brackets (slider type) and rotors. So, no need to get anything from the junkyard, you can get it all from DoctorDiff.

For the second question, yes, the 11.75 caliper brackets are available in both pin and slider styles, I have the pin style 11.75" brackets and calipers on my Challenger. Only the slider style is reproduced though, so, if you want the pin style you'll have to find a used set. And they usually cost a bit more than the slider style. As for which is better, I dunno. The pin style has the advantage of being able to change the pins, so, if things get worn you buy a new set of pins and off you go. The slider style depends on the surface of the caliper bracket being good, and if it gets rusty or chewed up you have to either dress it or buy a new set of brackets to keep things moving smoothly. So on that part I would say the pin style has an advantage. But, some say the pins flex more, which is possible. So you might lose some efficiency, I really don't know on that one. Probably splitting hairs. What I do know is that brake pads for the slider style calipers are easier to find and more plentiful, with more pad compound options too.

I won't buy a set of slider calipers just to convert my Challenger, but I also wouldn't seek out a set of pin style brackets and pay more money for them either.