Shaykh Allaamah Ibn Uthaymeen (Rahimahullah) was asked this question & this was his reply:
This questioner believes there is a difference between the two. In reality, there's no difference between them.
It is a matter of comfort. One can pray at the beginning of the night, middle or end of the night. The most
May Allaah count us among those whose sins will be forgiven in this blessed month. Ameen.