Thanks for the replies and advice. I wasn't sure in the flights with digits were strictly A320's and the four digit flight numbers were the E190. I came to that hopeful conclusion for two reasons: 1) Using "Flightaware" and punching in flights and 2). Legacy carriers for the most part use the four digit flight numbers for codeshares and regional flights.

Silly question, if I book a seat or seats with extra legroom on either aircraft, I am guarenteed that or those seats, correct? Also, why would row 1 on the
A320 be free? In addition, how much extra leg room? JB claims 38" on the A320 which compares to legacy carriers first class? Thanks for the reply