The E-190 will get you off reserve sooner, has better trips for junior guys (more productive, no redeyes, etc.), and you will build seniority/QOL sooner on the E190 than the bus.

As of the last system bid, the most junior pilot to hold the bus in FLL had just over 1 year on property. The most junior guys in MCO were 2 years for the E190 and 4 years for the bus.

If you want FLL, bid the bus. If you want MCO, bid the 190 (you can always swap over to the bus later).