Electric motors typically use larger props.
However, 140-160 2-stroke and 4-stroke engines use very similar props. (typically 16x12 to 18x10 or thereabout. If anything, the 2-strokes use larger props than 4-strokes.)
Surely it must be because the 2-strokes will wind up more than 4-strokes do (this can easily be heard when flying) which means that providing some degree of breaking (i.e. reducing the free wheeling speed of the propeller) must help slow down the model.
Magne