Delete this.onEnterFrame

Hi all,

I have a general question about

Delete this.onEnterFrame

as a opposed to

this.onEnterFrame = null

Do these both do the same thing or will there be a difference

The code below, is it best to use
[AS]delete this.onEnterFrame[/AS]
or
[AS]this.onEnterFrame = null [/AS]

[AS]
logo_mc.onEnterFrame = function() {
this._alpha += 10;
if (this._alpha>=100) {
this._alpha == 100;
delete this.onEnterFrame;
}
};
[/AS]