Can anyone shed some light on the decision to buy the E-190 aircraft over the Airbus 318 ?...... I have never seen a -190, But according to the description of the aircraft, it is very close to the size of the 318..If cost was a factor, would'nt the up front cost, [cheaper] of the -190 be erased over a small amount of time by the added expense of operating 2 types of aircraft vs. operating an all Airbus family fleet ?