Um.. can you post direct links or the specifications of each? I will be of more help then.
Here are the configs:
3rd Gen Core i7, 8GB DDRIII, Nvidia GTX 660m (2GB), HD Led, Blue-ray, Numpad (Full Keyboard), Backlit keyboard
Dell Inspiron 15r SE:
3rd Gen Core i7, 8GB DDRIII, AMD Radeon 7730 (2GB), FHD, Superdrive, keyboard without Numpad & Backlit.