Radius made a line of PrecisionColor 24 cards.
Then they made a line of PrecisionColor Pro 24 cards.
My understanding is that the former were long NuBus cards and the latter were short (7.25"?). The latter were also faster than the former. So back when such things were still sold by stores, one had to be careful about whether one was getting the original or the 'Pro' version. It mattered, a lot.
If all your cards are PCP 24 cards, I bet they're the same speed with differing amounts of VRAM. However, it's possible that the highest end card has an amount of VRAM that lends itself to more efficient interleaving tricks -- more memory, more banks, more choices for interleaving in creative ways. I'm just speculating, but it was always my understanding that they were all the same power, with differing VRAM, so if one is faster, the only ways I can see for that to be true are that my information was wrong, or that the extra VRAM chips creates an opportunity for more efficient interleaving and therefore faster memory access.
Oh, I know. Compare the part numbers of the large ASICs on the boards. That will tell you if there's truly any difference in the hardware.
Then they made a line of PrecisionColor Pro 24 cards.
My understanding is that the former were long NuBus cards and the latter were short (7.25"?). The latter were also faster than the former. So back when such things were still sold by stores, one had to be careful about whether one was getting the original or the 'Pro' version. It mattered, a lot.
If all your cards are PCP 24 cards, I bet they're the same speed with differing amounts of VRAM. However, it's possible that the highest end card has an amount of VRAM that lends itself to more efficient interleaving tricks -- more memory, more banks, more choices for interleaving in creative ways. I'm just speculating, but it was always my understanding that they were all the same power, with differing VRAM, so if one is faster, the only ways I can see for that to be true are that my information was wrong, or that the extra VRAM chips creates an opportunity for more efficient interleaving and therefore faster memory access.
Oh, I know. Compare the part numbers of the large ASICs on the boards. That will tell you if there's truly any difference in the hardware.