Face looks fuller and softer, especially cheeks and jaw area.

Skin appears smoother but slightly
flatter because of warm artificial lighting.

Hairstyle is shorter and flatter, giving less height to the face.

Expression looks neutral and relaxed.
Overall vibe looks younger and more casual.

Background lighting draws attention away from facial structure.

In the second picture (indoor, white background)

Face appears leaner, especially around jawline and lower cheeks.

Jawline and chin look more defined due to lighting and angle.

Hair has more volume and framing, which improves facial proportions.
Skin texture is more visible because of direct lighting.

Expression is more intense, which makes features look sharper.

Cleaner background puts full focus on the face.

Overall difference

The second photo gives a more mature and sharper look, mainly because of:
leaner appearance,
better hair volume,
stronger expression,
and neutral lighting that emphasizes structure.