I read all the threads I could find, but I still need to ask. Some people say that they are definitely not the same film, but it remained a bit of mystery what is actually the difference. So, what is the main difference between HP5+ and RPX 400 / Kentmere 400 (in 135 format)?
Thanks for comments.
Thanks for comments.

If I liked that result, surely I can get also pleasing results out of RPX400 by little trial and error. It seems that RPX400 does not suffer from general quality issues either, so that solves it for me. RPX400 it is.