Grand Host of Nagash battle traits

[TheAntsAreBack]

Looking at the Grand Host rules in scratching my head as to whether there is an actual difference in mechanics between the gravesite ability Invigorating Aura and the battle trait Legions Innumerable. I can't get my head around whether the difference in wording in the heal and return rules equate to functually different mechanics. 

[King Taloren]

The main difference between them is that invigorating aura only affects models within 9” a gravesite. And legions innumerable is a global heal that needs a 5+ to go off. There is no 9” requirement. And you can stack both if you have the range of a gravesite.

[TheAntsAreBack]

It was the "1 wound" part of it that had me scratching my head. The two rules are almost the same in this regard but phrased very differently. 

[King Taloren]

ok I see where that is. Basically one ability let’s you bring back a two or three wound model to a unit if you rolled high enough to bring it back to full health. (Provided there isn’t a wounded model already in the unit that would stop you from having enough healing wounds)

legions innumerable only lets you heal multiwound models or if they are one wound models bring back d3. You can’t resurrect a multiwound model.