Gate of Olympus and Starlight do have a chance of up to 500x, and have a higher level of difficulty compared to Sweet Bonanza, also Starlight and Gate have a smaller max win compared to Sweet Bonanza. If you want a faster multiplier, Sweet Bonanza is an option to consider, but if you prefer a multiplier that multiplies, you can try Starlight and Gate.
I'm not so sure what do you mean by faster multiplier, is it about the multiplier number we get in the game?
If you mean so, I would say the opposite because the multiplier is better in Gates or Starlight if we are talking about normal betting (non buy feature).
As what I know, there is no chance for us to get multiplier in normal betting while playing Sweet Bonanza as the multiplier comes in free spins only (cmiiw).
While in Gates and Startlight it is possible to get multiplier in normal betting.