Quote Originally Posted by Thomas Bertilsson View Post
A lot of times I hear exclamations that allude to not completely comprehending how two films should be compared: you can only compare their tonality AFTER they have been exposed and processed such that they have the same contrast. Then, and only then, can you tell the relative difference between them. Any other comparison simply doesn't justify the qualities of either film.

I have prints in the same series that are from FP4+ and Plus-X negatives. I dare anyone to tell them apart.
An example would be Tmax 100 and AP/APX100 both in Rodinal both superb films and final results are indistinguishable in 35mm through to LF, the only major difference was the Agfa films were rated at 100ISO and Tmax 100 @ 50 EI, dev times were identical.

Some of my series span longer periods typically 25 years+ and I have no issuse putting prints from Tmax100 and AP/APX100 alongside those shot more recently with Delta 100 and even HP5 (LF) although I have had to reprint on current papers but that's another issue.