I checked today and with the same specs except for gpu and chassis, obviously, price difference is amazing... 340 quid. Somehow I found it hard to believe that 555m and 560m has a £200 difference + maybe £100 chassis cost difference. Any ideas guys, PCS?
Its the same with everything you can purchase in the real world! Do you think that a Ferrari costs £100,000 more to build than a Ford Focus? Obviously not but you have to pay premium prices for premium performance (and you will find that PCS are cheaper than buying a similar speced machine from other manufacturers).
Also, as you said the cost difference isnt just due to the GPU, there are also differences in the Power Supply, Motherboard, Chassis etc