The only thing I notice are that posters keep changing once in a while in the playlist, especially movie posters I have recorded
as to logos it all depends on latest SW for any receivers, although from what i've seen, Genie usually adds or update channel logos first before the rest of the HR2x receivers do, if they have the latest SW.
All I can think of is that the logos are copyrighted trademarks. Things that most take for granted, like fonts, shapes, proportion, placement, color, etc are all legal representations of network properties. So there shouldn't be that much deviation from unit to unit, unless the older units are storing different versions of or older trademarked logos.