Is there any difference between these two statements in ext?

[exting]

Ext.override(Ext.util.Observable, {
releaseCapture: function(o) {
o.fireEvent = Ext.util.Observable.prototype.fireEvent;
};
});


and



Ext.util.Observable.releaseCapture = function(o) {
o.fireEvent = Ext.util.Observable.prototype.fireEvent;
};

Is there any difference between these two statements in ext(seems identical to me)?

[burnnat]

Using Ext.override() allows you to call this.callOverridden() within the function to execute the original function that's being replaced. You aren't able to do that if you just overwrite the prototype method directly.

[exting]

But in this specific case this.callOverridden() is not called,so they're identical,right?