whats better quest XP, Gnoll fangs or Deathfist belts?

[Zaphyer]

i know both are popular, and i know gnoll fangs give good xp when you turn them in, and even more so when you turn in the moonstones that you get from the fangs.

ive never done the deathfist belts. Are they about the same XP? im also
aware that you get less and less XP the more you level while you turn them in
. i think at around lvl 17 you dont get much xp for fangs anymore.

thoughts?