I would expect you to earn considerably more in DI than in DII, because the fans are much more interested in buying tickets.
This only holds if his area is big enough. Mine, for example, has been designed to be full at max prices in DII (which, one may argue, has been optimal up to now). So I am lucky I have some spare cash to extend it a bit, otherwise the only benefit I get from promotion is a 40% tax instead of a 25% tax...
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."