Update: all APXn and Kentmere are identical. Also I couldn`t see a difference between RPX 400 and APX/Kentmere 400 anymore, it seems Ilford didn`t want a RPX to be better than a Kentmere. I can't see why I should buy a more expensive RPX 400 anymore.
The whole set can be seen here at full resolution:
roastery at flickr