The Sugar Rush series is not one single game repeated under different names. The versions share candy visuals and cluster-style ideas, but each one changes either the theme, the bonus profile or the way the grid behaves.
Sugar Rush is the base version. It uses a 7x7 grid, cluster pays, tumbles and multiplier spots. This is the best starting point because the main rules are easiest to learn here.
Sugar Rush 1000 keeps the same general identity but aims at a more intense bonus profile. Players usually compare it with the original when they want stronger potential and accept sharper volatility.
Sugar Rush Xmas is mostly a seasonal presentation change. It keeps the familiar mechanics but wraps them in a Christmas style, so the difference is mainly visual and atmospheric.
Sugar Rush Super Scatter puts more attention on the bonus trigger and high-potential feature play. It is the version to test if you care most about the bonus profile.
Sugar Supreme Powernudge changes the feel more noticeably through the Powernudge movement. The grid can shift in ways that create fresh cluster opportunities, so it feels more active than standard Sugar Rush.
Sweet Rush Bonanza is a related candy slot rather than a direct clone. It is worth testing separately because special bet options and bonus pacing can change bankroll planning.