No, curl defining cream and leave-in conditioner are not the same products, although they can serve complementary purposes.

Curl defining cream is specifically formulated to enhance and define natural curls or waves. It typically has a thicker consistency and contains ingredients that provide hold, shape, and definition to the hair. Curl defining creams often contain polymers or resins that help to create and maintain curl patterns, as well as moisturizing ingredients to combat frizz and dryness.

On the other hand, leave-in conditioners are designed to provide additional hydration and nourishment to the hair. They are usually lightweight and can be applied to damp or dry hair to help detangle, soften, and protect the hair from environmental damage. Leave-in conditioners typically contain moisturizing ingredients like humectants, oils, and proteins, which help to improve the overall condition and manageability of the hair.

While both products can be used together to achieve optimal results, it's important to note that curl defining cream focuses more on enhancing and shaping curls, while leave-in conditioners primarily provide moisture and nourishment to the hair.