Also, kids mature at different rates, with differences in height and weight between kids of the same age. (kidshealth.org)
You do see differences in height and weight, battery capacity and RAM, and the P20 gets one more color that the Pro does not — champagne gold. (cnet.com)
That big difference in height was there because the devices needed space to shoot the infrared beams across to pick up your finger. (gizmodo.com)