1. In terms of eyes, Bai Baihe's eyes are longer and narrower than Wang's, while Wang's glasses are rounder and have larger eye spacing.

2. As for the nose, Bai Baihe's nose is relatively wide and fleshy, while Wang's nose is relatively narrow and pyramid-shaped.

3. In terms of mouth, Bai Baihe's lips are plump and Wang's upper lip is thin. When laughing, Bai Baihe's corners of the mouth are horizontal to both sides, while Wang's corners of the mouth are obviously rising.

4. In terms of teeth, Bai Baihe's teeth are arranged in a larger arc, while Wang is flat, so when Bai Baihe smiles, the gap in the corners of his mouth is larger.