I think the OP's question needs to be modified as follows:
IF the money was the same would UK accept an ACC invitation?
Make no mistake, that is a HUGE "IF". But it does focus the question more on what would actually be best for the UK athletic program. Notwithstanding the tradition of their SEC affiliation (i.e., a charter member) some other points to be considered...
> Unless UK got stuck with annual football games against FSU, Clemson and maybe a resurgent Miami or VPI the football program would usually see an "easier" conference schedule.
> OTOH, men's basketball would see a significant increase in conference difficulty. Does UK "want" that?
> Travel distance for fans to other schools would be shorter in the SEC
> "Competitiveness" in other sports would more or less be the same BUT UK would likely have to sponsor more sports programs. ACC sponsors 14 women's and 13 men's sports; SEC sponsors 12 women's and 9 men's sports (source Wikipedia)
Just food for thought on the subject.
Peace