In terms of weight, the original iPhone weighs 4.8 ounces, while the iPhone X weighs 6.1 ounces. The processor on the X, 2.39 GHz, is about 5x as powerful as the original iPhone's processor ...
There's also the question of whether or not the iPhone X is a lot better than the 8. On the inside, they’re almost identical. They have the same processor. So if you go with the iPhone 8 ...
and better rear cameras than the iPhone 8 Plus. Other features include a stainless steel body, wireless charging, A11 processor, 2x zoom camera, water resistance, and NFC.