There's a limited number of Brasillias in the fleet, and we just lost some Texas runs. There's definitely far more openings for cheiftain pilots than EMB FO's.
EMB FOs are the bottom of the pecking order and pay scale. However, you can get into AMF at an earlier time, build up seniority, and skip the chieftain for the 99 when you hit 1200 hours. I have seen a few people do it, and it has worked out pretty well for them.