There's Jet FO pay and Prop FO pay. That's it and that's all.

There was a TA that got yanked at the last minute in December (long story) that was going to make it one pay scale. That didn't happen and therefore Eagle loses tons of $ from training costs associated with FOs leaving the props for jets because of the pay disparity.

It may sound odd after my last couple of posts, but that's the way it is. You are allowed to leave a prop for a jet as an FO, but cannot sidestep from one jet to another unless it's with a captain upgrade.

Example:
Joe gets hired as a Saab FO. He wants to fly the ATR. He is unable to go from prop to prop, but if he wanted to go to the CRJ or ERJ he could. When he makes captain then he's allowed to choose whatever plane he wants.