Are two birth controls the equivalence of the morning after pill?

No: Hormone amounts are different than in birth control packs. And if you take two from your daily pack, you will have to skip a day (later), increasing chances of pregnancy then. "plan b" had two pills, but other morning after options do not.

That depends on the: oral contraceptive . Check reference chart to see which oral contraceptives can be used for emergency contraception and at what doses. http://ec.princeton.edu/questions/dose.html#dose