I just did a vanquish of Nebbo Terrace earlier tonight (me and 5 H&H).
No golds, one or two purples, one regular tome, few blue, total about 20 items.
Left the collectable drops and a few whites, I have not that much space on my character. Gold gained was less than 1K.
Dual-smiting the undead there net's more than this entire vanquish.
Tried to dual Eastern Frontier earlier today, me and hero.
Killed about 100 foes, no golds, one or two purples, several blue and white drops.
HM Hell's with guildie did produce about the same, nothing special.
Overall experience over longer time:
HM nets me more gold overall, but drops can vary greatly.
I have vanquished several area's on all continents with guildies and on some the drops were a lot better than others.
Gold items drop more often in HM than NM.
Reason for playing HM.... Our guild specialized in it