BA / MD programs are extremely competitive, who wouldn’t want to trim a year off of college and be guaranteed the holy grail of medical school admission.
So the answer is the best one is the one that you are actually accepted to and that you can afford (some are very pricey with 7 years of private school tuition which can be half a million dollars at say Drexel).
Also these programs vary, some guarantee admission without MCAT scores or a lot of prereqs and reasonable GPAs and some are not really guarantees at all (if you need stellar MCATS + GPA + then what is your program really doing for you).