Pilot B probably made more money (pay and per diem), got layovers in Munich, Bangkok, Anchorage, Honolulu, and Paris...Pilot A got layovers in Buffalo, Des Moines, and Greensboro. When pilot B hits his 5 year point, he's a 5 yr MD-11 capt already making $140/hr (hypothetically) and pilot A is a 5 yr ERJ capt making $70/hr, sooooooo...let's say another slowdown in pilot hiring happens, yes, I know that NEVER happens in aviation, HR ALWAYS knows when and how many pilots to hire but let's say it does and UPS and FEDEx aren't hiring that year so both pilots are stuck where they are...hmmmn, $140/hr and layovers in London or $70 and layovers in Rochester?
I know your point was which is better, 2500 RJ PIC or 900 MD-11 PIC, I'd go with the MD-11 plus it's a "safer" bet in the long run...just my .$02...