Junior/Senior, no difference under the rotational bid system.
Top bid could get 18 days off, but THAT was because you were flying ULH flights to do the hours and NEEDED the days off to recover. Just like EVERY other long haul operator.
Next month, top bid will get 14 days max. Even doing those ridiculous IAH turns, sorry layovers. Kinda hard to differentiate. So, a guy hitting the hours on ULH flying (because he bid for them) will have less recovery time. But that's ok, as Ed said he had an obligation to the regulator to balance the load so we were safe and all that. Cutting days off while flying ULH really helps.
Now I get it, you wont stand a chance of getting a month of ULH in top bid. You might get one ULH but will need some really unproductive flying to make sure you don't get more than 14 days off. Like CGK 72 hours or regional back of the clock stuff to KWI or DOH...all in your top bid. The more productive you try to make your roster, the more you need unproductive flights to keep the regulator happy.
odds on how long it will take before there is a correction?