The essentials
The original established the 6×5 pay-anywhere grid, tumbles and orbs up to 500×. Gates of Olympus 1000 raised the orb ceiling to 1,000× and the overall maximum to 15,000×.
How it works
Xmas 1000 presents that upgraded formula in a seasonal setting. Super Scatter returns to 500× regular orbs but adds fixed trigger prizes and a 50,000× maximum.
Practical takeaway
Fortune of Olympus changes the structure to a 7×7 cluster-pays grid. It is better viewed as a related branch of the universe than a direct replacement for Super Scatter.