What's the (mental) quality different between aversive leaving (vi-bhava) and renouncing (nekkhamma)? Whats the different between leaving, abounding, letting go, push away, say out of aversion, anger, and renouncing?

Both seems to be combined with tanha (thirst), yet one is called ku-sala (bad-cutting away) and one a-ku-sala (not bad-cutting away). And/Or is renouncing combined with a-moha, not-not-knowing or moha, not-knowing/delusion root of aversive notion of desire for leaving, letting go?


  If, by forsaking
  a limited ease,
  he would see
  an abundance of ease,
  the enlightened man
  would forsake
  the limited ease
  for the sake
  of the abundant.
  
  — Dhp 290


Sound gready, that what gives rise to "aversion", like strong desire for refined pleasure, yet even 'enlightened' situation.

How is renouncing conductive toward and on the path, leaving and let go part of the path of liberation?



A realated topic with given space for discussion and possible answer can be found here.

(note that this question is not given for trade, stacks, exchange or entertainment, but for ones work trough the wheel here and liberation)
Vibhava tanha arises as a result of attachement, aversion and ignorance combined with the wrong view of Nicca, Suka , Atta and Subha. 
Nekkhamma is a result of non-attachement, non-aversion and wisdom combind with the right view of Anicca, Dukkha ,Anatta and Asubha.