His work combines the clarity of French Neoclassicism with the domestic subjects of the Dutch tradition. In "Dansende bedelaars" and his various academy studies, he focuses on the weight and posture of the human body. He used light to define shape rather than to create atmosphere. His religious works, such as "Mater Dolorosa" and "Ecce Homo," avoid theatrical poses. Instead, they rely on a quiet, sculptural stillness that reflects his formal training.

Collectors value the technical honesty of Mol's sketches and portraits. His "Zelfportret" and "Zittende man steekt zijn pijp aan een test aan" show a directness that feels modern. These works do not rely on grand narratives. They offer a clear look at human expression and daily life. His drawings provide a sense of calm and order that fits well in minimalist or contemporary interiors.