Hi,
There is really no need to if you are interested purely in the function of the product e.g skin cleansing or moisturizing. The active ingredients in a Men’s range vs a Women’s range of products are often the same, hence the effectiveness and arguably skin tolerance to the product will likely not differ at all.
The key difference lies mainly in the packaging and fragrance that may appeal to different genders.
As an extension to this topic of a product’s targeted group labeling, children's formulations tend to contain lower concentrations of active ingredients. Sensitive skin formulations tend to avoid known irritants and allergens such as fragrances and strong preservatives, and may be more suitable for use in the specific groups.
Always good to have more choices than fewer!