"Every single micrometeorite will hit the Moon ;while that is not the case with the Earth! Meteorites vaporize before they hit the ground; except for bigger ones."

Yes but more micrometeorites would hit ISS than lunar surface. Granted there is slightly more atmosphere at ISS orbit- though that shouldn't be enough of a difference to have much effect, and of there is all the manmade debris at ISS orbit.

Also lunar terrain would have some affect on lowering the amount of micrometeorites. And the Nearside and polar should have less.

Say, if put a box 10 meters on the side up on a tower which is a mile high- it should get slightly more impacts on it then a box 10 meters on a side on the ground.
As far most structures, probably solar panels would be most affected- large surface areas and they are pointed towards the sun.