Either camera would be a good choice.

I guess it boils down to.....do you want a 10X optical zoom, or not? And only you can decide that.

Both cameras produce excellent photos.

The cameras are about the same size (vertical/horizontal), but the Olympus is twice as thick as the Canon (2.7 inches and 1.4 inches.
The weight of the cameras is about the same.

I have been to Disneyland (several times) and never saw the need for a big zoom camera while there.