Originally Posted by
BoilerUP
The E-145 is lighter and burns less fuel compared to a CRJ-200.
The CRJ-700/900 is lighter and burns less fuel compared to the E170/E175.
As for costs...the B&CA Purchase Planning Handbook can give you a rough idea on each airplane:
BCA's Purchase Planning Handbook
But passengers are happier on the Barbie Jet vs the WSCOD and happier on the Stretch Jungle Jet than the Stretch Barbie Jet.
Of course the airlines don't give a damn about what the passengers think...