In my opinion, short sectors such as this, en-route time is irrelevant, it's the time from check in to bag pick up that matters to me when flying as pax.
Differences in en-route can easily be made up in check in time reqts etc.
In my experience DJ are far ahead of QF an QL in this area.
The Embraer is without a shadow of a doubt better to pax on than a q400.
All these factors combined, give me DJ anyday!