Marat, the GR and FX laptops are from completely different lines and are not comparable. There are many more differences than the size of the hard drive. The GR line is a corporate based model and is thinner (1.4" vs 2") and lighter (5.6lbs vs 6.8) which will always cost you. It has a larger hard drive (which is removable), a 16MB Radeon video card vs 8MB M1. The GR line has a modular media bay unlike the fixed drive in the FX line. The GR line also has a memory stick slot which the FX series doesn't. The 256MB in the GR line is one DIMM so you have one slot open an you need only add a 256 to max the RAM, while the FX comes with 2x128 which means you have to discard both sticks and buy 2x256 if you want the max. There are probably other differences that I missed, but your comment that these laptops are comparable is completely unfounded.