I don't see any direct indication there that the new replacements aren't the same type of hub, but I AM curious as to why the change, and what it is... (note that the picture does say "image may not be accurate for this application", and is the same pic they show if you bring up the 37780)
If you talk to them, please be sure to let them know the whole RBV community is depending on those 37780 hubs.
29071 hubs suck donkey dick. Who f'in cares if they are warrantied for ever?? If you're out on the trail, you don't want the damn things breakin' on you every 100 feet!
(IMO, #29071 should BECOME #37780)