If you had the option of choosing either the CRJ or the ERJ during training for Airline X, which one would you chose and why?

Whichever one provides best QOL or gets you on property sooner.

If you don't care about QOL, ERJ if it's a 170/175, CRJ if it's a 700/900. Neither if it's a ERJ-145 or CRJ-200.

ERJ 190. That means I don't have to switch airframes as much right?

If you mean a 145 ..... Versus a CrJ 700 then go with the 700 all day long .... 145 is booty ....

all else being equal, a jet is a jet is a jet...

Do you mean either or did you really mean "neither" as in you wouldn't fly either one?

Whatever pays you the most money. Either in terms of hourly pay, time to hold a line, lifestyle, or upgrade.

Whatever gives me the best QOL.

Whichever lets you live in the base you want. Commuting SUCKS!!!

Yeah, but some have wing mounted engines. Those I don't care what people say, I'd fly those for free!