Answer:
Okay so basically
one way is that Mussolini craved for power and Hitler wanted to cleansed a race.
another way is that Mussolini came from a decent family. His father was aspiring and his mother had a stable job with a good pay. Mussolini wanted to show off his talent.
Hitler on the other hand was tortured by his father. Hitler only came to the office because of struggle and desperation.