I'd say that's related to size of step on counting down the bonus ladder when it's collected. Might be whether it breaks out the multiplier into separate steps (1000), or combines them so that each level of the ladder is just one step regardless of multiplier (Multiple).
Example, x3 Multiplier, 1000, 3000 bonus:
1000-1000-1000,pause,1000-1000-1000,pause,1000,1000,1000
Example, x3 Multiplier, Multiple, 3000 bonus:
3000,pause,3000,pause,3000