mr jet lag - beleave is actually spelled believe. and differents? man, from where did you learn your english?
anyway, i'm not actually much into spellings and grammars but i do get your point. and as a matter of factly, your statement about pay and upgrades is not actually correct.
330/340 and 320 captain's basic are the same. overtime plus layover allowance in ULRs, yes, they do make a difference. widebody jocks do get some extra but as you say, upgrade is upgrade. but what the heck, i've done ULRs already as FO and enjoyed the layovers, but if the company decides to make all internal upgrades now in the 320 fleet, and they offer you left seat, would you not accept it? tell me, what would you do? are you gonna wait it out as EY widebody FO for the next 3 yrs or are you gonna quit and look somewhere else for a company that can give you widebody upgrade, even if you have to wait for 5, 6, 7 or 10 years? nah, i don't think you'd have the patience to do that. and worst case scenario is if you keep moving from one company to another you might get stuck as FO for the rest of your career. so let's just study our books man, and get our upgrade here in EY. once you get the bars, then it's up to you if you want to wait to be CCQd or move somewhere else.