i would think that no matter how it is programmed, it really does not make a difference.
for example, in bushwhacker two if you play that. the amicus island casino. people think that betting the 10x instead of the 5x or 1x is better. it technically is only better in that you have to click much less often, but mathematically it is the same. say there is a 1% chance of a puzzle piece win. play 1000 citrines at 10x and you might on average win once piecesX10. play the same 1000 citrines at 1x, a lot more clicking, and you on average will win 10 puzzle piecesX1.
in the case of this in idols there is no user interface difference if behind the scenes it is 100x1 or 1x100, and there should, i repeat 'should' be no difference in the overall odds.