Many people have inherited great power and wealth and squandered it. That's the default case.

Philip inherited too. He built on his father's very considerable success, just like Alexander built on his father's.

Amyntas III -> Philip II -> Alexander III

They're a dynastic set. There's not a lot of sense in separating and comparing them.

But in terms of lasting impact, it's not even close. Philip II exerted control over Greece for a brief time but didn't change much. Alexander changed the entire world permanently.