I haven't played a Broadcaster in a few years, but the A5 magnets do have a different tone than the A3's in the Nocaster pickups. I prefer the A3's in pine and ash bodies, and A5's in alder and thinlines. (I also like A2's in ash--for comparison, the Seymour Duncan Jerry Donahue.)
Are we talking about the Duncan Broadcaster ? If so it has Alnico 5 magnets and a copper-plated steel baseplate. On its side the Fender CS Nocaster bridge pickup has Alnico 3 magnets and a zinc baseplate, in term of output it's closer to the Duncan than the older Nocaster which was thick and loud. The Broadcaster is definitely more punchy and raw, it has more krang than twang, definitely a bit overwound sounding but not too much middy, well balanced and gound sounding with any type of wood; the nocaster is less gritty and maybe a little more complex sounding. But you know it's only words and words are what you make of them...
ah yes.... I want to know about the broadcaster pup from Baja tele, but your explanation about Duncan Broadcaster and the CS Nocaster is very well explained