Every pokie on the shortlist below is a scatter-pays game, which makes the comparison sharper than a return figure alone. Gates of Olympus, Sweet Bonanza and Big Bamboo all carry high volatility and maximum wins in the thousands of times the stake, while 50 Lions caps at 600x and sits at medium-low. Floating Dragon and Starburst are closer on return but still pay on scatters rather than marked lines.
Return figures across the list are bunched within a narrow band, from 96.79% down to 96.08%, so the real differences are volatility, the size of the top prize and how wins are triggered. Read the ranking notes for what each game's published numbers imply about the sort of session it produces, and remember the partner's terms: a 600% first-deposit bonus with 10% daily cashback on losses, a US$20 minimum deposit and a A$5 maximum bet while a bonus is active.