Tower of Terror - MGM (Hollywood Studios) vs California Adventure

How do they work so different? DCA Tower of Terror VS MGM (Disney’s Hollywood Studios)

I found out that the drop sequence is about the same amount of time for both of them. It's about a minute:
MGM: http://youtube.com/watch?v=9ZGYPvlcX-E&feature=related (about 3.45 minutes)

DCA: http://youtube.com/watch?v=r1J_c1EkKzQ (2 1/2 minute ride)

I find those two rides interesting. For MGM (Hollywood Studios), the ride is sort of built like a square while DCA (I don't think is.). For the MGM one, you are in the basement when you get off, and than it moves sideways (when no one is on it), and than it goes up to the floor where you board. Than it raises up, and than it goes sideways. After it goes sideways, it's ready to drop. Than, it empties, and goes sideways when there are no people in at the bottom floor. There are 4 elevators for this ride.

For the DCA one, I believe that it just goes up and down, and it doesn't go sideways. I think there were only 3 elevators instead of 4. If it did go sideways, than they would have that story, but they don't. Also, I believe that this one takes a lot more time to board. There is a bottom floor, and a top floor to board the elevator. They have have 2 elevator vehicles in each shaft. They can just move the elevator vehicle that's boarding forward more so that the other elevator can go up and down through the shaft. Remember, that these elevator vehicles can turn, and move on the track. The one at DCA is like an inverted F.

So, you board on the bottom floor. This elevator vehicles departs. After maybe the minute and a half mark, the elevator vehicle on the top floor opens up. It's moved forward so it's not in the shaft. People start loading the ride. The other elevator vehicle is finally done, and it goes to the bottom floor where it belongs. It's sitting there waiting until this top floor elevator vehicle is done with. Remember, there are two elevator vehicles.

For the other MGM tower, there are 4 elevator vehicles. I imagine is has to clear a certain section in order for it to work properly. If you are in the drop section, than you can't have an elevator right near the drop section. If the people taking there time on the bottom aren't out of the vehicle, than it can't drop. It's too close to the other vehicle. Through the sideways part story, there are 2 tracks, and 4 up shafts. There are only 2 shafts that go down also. Obviously, they spent more money into MGM than DCA. It shows.