surprisingly, I found Acros 100 to be one-third stop slower than TMX (TMax 100). additionally, though the RMS grain specs are slightly better for the Fuji film, real-world Xtol results showed that TMX was slightly finer grained. TMX, Acros 100, TMY. unremarkable for me, and TMX remains in the camera. Acros 1600 would be a kick however.(posted 8414 days ago)