And in Woopers overally height.
The differences are minor or fairly noticeable. Male Scizor looks narmal, but the female is fairly smaller, a little fatter and has a different abdomen. But then Butterfree's only difference are the Black spots that the females have.
I expect some Pokemon, as previously stated, will have dramatic differences. Female Machops line, Abras line, and many others will probably be changed a lot. Perhaps Machops line will have more womanly body shapes around the hips and arms. I should imagine a male Aridos would be smaller with less menacing features.