^^Well yea, the Asus one might be a little heavy at 4.5kg, due to the 17.3 inch fullhd display, i7-3610qm, 16gb ram, gtx670m 2gb, 750gb hdd, 256 gb ssd.
I guess you don't realise the performance difference one gets with the gtx670m + 256gb ssd when compared to gtx 640m and hdds