DS2500 were fine on my old remapped 2.4 when I was 20 and drove everywhere like a ****, I loved then and I never had much problem with noise as I was always very late to brake and always did so pretty heavily (284mm fitment). But I found them a bit much on my previous GTA (305s), I couldn't use them hard enough on the roads to stop them getting squealy.. They were fine to use hot or cold, just incredibly noisy when using the brakes lightly and at low speeds. I don't know what Performance Friction you've tried previously as we've had two compounds in the 305 fitment, the first is road/race, bitey as anything, dusty and immensely powerful (more so than DS2500), I can see how people would find them aggressive. I had a couple of sets of these on my 3 litre 156 and loved them (305s again). The other PF compound is a bit easier going, not as bitey or dusty, but still with almost as much stopping power after the first couple of pedal presses and still fine when cold too. We first used this compound on Ned's 3.2 engined 156 V6 which had GTA 305s fitted and either got lent out as a loan car or got battered round Bedford Autodrome, both of which it did just as well.
Red Stuff I had on my 3 litre GTV and they were OK (305s again) but nothing special at all, not as good as either DS2500 or PF. Green Stuff fell apart on me (305s), and I have Yellow Stuff on my current 2.4 (284s) which are good enough when hot but wooden when cold.
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