The nurgle dp is the only version that doesn't shares the animation attacks due to having a great weapon
Wile the others all share the one handed type
And khorne dp has dual axes but the poor bugger doesn't has duel wielding attack animations so he never uses his second weapon same goes to the dp of slaanash with his 2nd crab claw .poor lads
Heck all variants of tzeench dp have the same staff he even doesn't uses it as a magical weapon just uses it like a regular beating stick talking about being demon mastery of magic .
Heck the great weapon version has more attack animations then the one handed version even
So demon prince of nurgle for the win