While we're on the subject:
Max upgrade for state/national corps:
200
Max upgrade for CEO corps:
225 - 230
Max upgrade for truly public corps:
250
Output quality is maxed at 333, with the exception of truly public's, which I've seen (my corps) produce at 370 quality.
Just by those baselines, a corp run by a president, vs a CEO, all else being equal, will generate less money. But, everything can be screwed up (apparently, with me as the CEO, the smart bet would be on ANYONE else, even a president - provided the president ISN'T me!)
Good luck with your money hunt Warren!