You realize the second photo actually is an iMac, not the HP product? There is a huge white (or aluminium) bar at the bottom of the screen of the iMac, which the HP doesn't have. From the photo I'd estimate it is at least 10cm high.
If your dad couldn't tell the difference, maybe he needs new glasses? Or perhaps the money for an iMac was wasted on him and he could have gone with a cheaper (plastic instead of aluminium) PC.
If your dad couldn't tell the difference, maybe he needs new glasses? Or perhaps the money for an iMac was wasted on him and he could have gone with a cheaper (plastic instead of aluminium) PC.