I've flown both. The 145 was better to hand fly.. the CRJ is more sturdy... Bet the CRJ is cheaper and parts are a plenty, and cheap. It will last longer... Based off the engines are more widely used..

I remember racing my friend ORD-BUF he was a ACA CRJ200. Me a Eagle 145. We took off 22L, 2 mins before him. He landed 10 mins sooner was 2k feet below us and burned 400lbs less fuel.. Very unscientific but was interesting..