Good question. I am looking to go down the same route
By impact are you talking about career or salary outcomes? Or impact to the business? Our finance folks get recruited out of undergrad or from MBA programs, haven't met anyone who did a specialized masters. I did the MBA route and I believe grade and salary levels are based on the tier of the school attended.
Add to that, the variable of whether or not they're shitbags. Just because you have certain levels of education does not make you good at your job, or make you into a leader.
I'd also like to know