There's no way to tell. If I was forced to put money down I'd pick ASA and CHQ in no particular order.

ASA because of 50 seat feed in CRJs which require more MX and burn more fuel than ERJs.

CHQ because of 50 seat feed, overlapping markets with other regionals, no DAL based aircraft, and CHQ management's willingness to drop ERJs if DAL will take additional E-jets.

Of course performance numbers will speak volumes. Haven't seen any of those.

Thread drift in Three... Two...