In the first example, you are just inheriting amitBaseClass prototype.
function SomeClass() {
}
SomeClass.prototype = Object.create(amitBaseClass.prototype);In the second example, you are executing the constructor function. An instance of amitBaseClass is created and you are inheriting the who complete amitBaseClass object.
function SomeClass () {
}
SomeClass.prototype = new amitBaseClass ();So, both are doing separate work.