SF Magic Mountain does indeed have more coasters, but they then proceed to choke the life out of them with excessive braking, uncomfortable restraints, slowed lift chains, and poor operations. To me, MM is about one decent hyper (Goliath), one admittedly great inverted (Batman), one way-overrated stand up (Riddler), one over-way-too-quick reverse freefall device (S:TE), numerous rides that were once great but now suck (Revolution, Colossuck), rides that never were great (Psucklone, Flashback) and a few old dependables that offer tame but reliable thrills (Gold Rusher and Ninja). Additionally, MM has NO flat rides to speak of, their water rides are decent but non-descript, their food is TERRIBLE, the employees don't give a **** about the guests, and the average MM crowd is on weekend pass from the nearby correctional facility.
Something's wrong when the coaster with the most airtime (Canyon Blaster) and the best flat ride (the Balloons) are BOTH in the children's area.
Knott's, on the other hand, has two world-class coasters (GR and Monte), great flat rides, wonderful water rides (including the best log ride AND the best Shoot-the-Chutes I've had the pleasure to ride), incredible food, good operations, and wonderful employees.
But, yeah, Apollo, go to MM, they have more coasters...