I was on Accutane for about 2 months, but they made me stop taking it due to an increased CK count...which is basically a heightened ammount of muscle enzymes. Results varie, but I found it to be a success right off the bat while I was on it. Since I never did a full course I'm probably not the best person to be answering this.
What I can tell you about mino: For some people is great. It may not be a perminent solution, but for a lot of people it holds the acne back until it naturally goes away.