1969
The Pitcher's Rubber is 10 inches higher than Home Plate.
Heigth difference between the top of homeplate and the top of the pitchers rubber.
There is no height difference. A softball mound is not raised like a baseball mound.
In MLB, no. The last change in mound height occurred at the start of the 1969 season when the height was lowered from 15 inches to 10 inches.
18 inches
There is no height requirement for major league baseball players. I will add this observation though. Generally speaking most scouts recommend pitchers and first basemen to be 6 feet tall. There are exception's to this of course.
Heighth difference from top of homeplate to the top of the pitchers rubber.
The height of the little league pitchers mound is 6".
15 inches. It was lowered to 10 inches in 1969 to help increase offense.
The height of the mound and the size of the pitching rubber could vary from one level of baseball to the next, but within each level, they will be the same.
In MLB, the pitching rubber is at a height of 10 inches.