Not a major discovery or anything worth revising printings on I don't think, but in comparing the two
PotVQ 5th print (brown) copies I have, there are noticable differences between the color and stock of the covers:
The one on the left is Morno's copy, and is a slightly lighter brown. This textured cover stock is more like most WW covers I have seen/compared to (my Misty, DGs, etc).
The color of the one on the right matches more with the scan on Acaeum, though it's too hard to also tell what the textured cover is like from that scan. The one on the right definitely has a different more faux-leather textured stock than Morno's on the left. The one on the right is also slightly taller.
Aside from these differences, the inside contents are the same.
Curious for others with copies of the 5th print to compare/contrast and post their thoughts, and other comments as well.