software - i'd say both equal, alienware might come with more software, but that doesn't mean it is good, who knows i might say sager utility software is better, their hotkey software dont take much of my resources and most importantly it wont minimize my games when i use the hotkey, unlike HP hotkey software, well i never use alienware before, so i cant say much about this.
hardware - +/- difference
new technology - not even your pendrive can support 3.0
pricing - sager win, reason is obvious
quality control - alienware and dell?! WHAT?! i side with sager for quality control
heating problem - you mean np8690 have overheat problem? LOL....
discount - who cares, if you got the budget already and you still want for more discount? gaming laptop at this price range is very cheap, go get a desktop if want better specs.
+1.
And... I've never heard of the term "overheating" on these Sagers, unless the user meddles with the heatsink or other crap.
And... No such thing as "free delivery". Look at Dell and that's what "free delivery" gets you.