Pictures could be taken years apart. We all gain weight, lose weight, even our bones continue to grow.

Angles could be different. The lighting different.

different cameras lens could stretch images differently. camera pictures could be taken in different ratios. camera effects could be altering images.

Dental work could change a jaw line or how people clench their teeth and the shape of their mouths and jaws. Noses continue to grow throughout our lives. Eyes can change shape based on how much sleep someone has had.

Skin gets puffy from eating too many carbs. Diet makes us looks bloated or lean. Hydrated versus dehydrated. Sun or no sun.

There's too many variables.

Based only on the two pictures above, i agree they look like different people. But not 100% certain.