Anime pastels, a six-by-five board, and an entirely different animal
Starlight Princess is what happens when a studio takes the scatter-pays grid it already knows works and rebuilds it around a completely different multiplier philosophy. The board is six columns by five rows, the symbols are hearts, stars, hourglasses, gems and a wide-eyed anime princess, and the presentation is all lilac, silver and rose. Eight or more matching symbols anywhere on the board pays, position irrelevant, and the winners tumble away to be replaced from above.
On paper that is a description of Sweet Bonanza with the fruit swapped for gemstones, and a great many players file it exactly there. It is a bad filing. The two games behave differently enough that treating one as a reskin of the other will cost you, and the difference lives entirely in how the multipliers arrive and what they can be worth. Sweet Bonanza is a game about tumble chains. Starlight Princess is a game about a single number. Once you understand that, the two machines stop looking like siblings and start looking like arguments about the same idea.