everyone is correct in saying that there is a very fine line. but without knowing any more specifics, i think finance is slightly better than accounting in a "EE (electrical engineering) is better than ME (mechanical engineering) is better than CE (civil engineering)" kind of way.
if the company needs to hire someone who knows accounting, they will hire a CPA or CFA, not an MBA. if the company needs to hire a CFO to be an executive, they will probably hire an MBA with finance or accounting (doesn't really matter).
My Wharton Blog - http://www.whartonblog.com
Wharton MBA for Executives Ambassador - http://gmatclub.com/forum/128-t66295
My Story - http://gmatclub.com/forum/102-t49770