I like Type 52 for prints and Type 55 for negatives (of course). I think the grayscale of a Type 52 print is both long and beautiful. I have framed several. For negative work Type 55 is as pleasing a film as I've found. I shoot mostly TMax 100 but there are times I will reach for a packet of T55 because I know it will be better for the subject.
Type 55 seems to me to be virtually identical to the old Panatomic 25. I usually shoot it at 25 as well. Very fine grain, very long tonal range really nice and smooth shadows. If it weren't so expensive I would shoot a lot more of it.