My results are very a-typical and I have no idea why:
Rogaine - dense regrowth within 5 months. Filled out all the way up to the front of my hairline. However, minoxidil was lowering my blood pressure and making me very tired. I tried lessening the dosage but no difference, I'm very sensitive to it even when applied topically although it was originally a high blood pressure medication. My hair was not worth my energy/mood.
Stopped medication for 8 months and thinned out again before starting...
Propecia - been taking 5 months. Good regrowth all over but not as dense as the rogaine. Maybe it will just take longer but I have a feeling I responded better to the other. Sexual desire is down somewhat (didn't notice it until the past few months) but performance is still fine.