Hi Anni!
The OGX Keratin Oil line focuses on strengthening and protecting hair from breakage, and it is especially suitable for the care of fragile or treated hair. It contains keratin as well as argan oil, which adds shine and softness without weighing it down.
In contrast, the Brazilian Keratin Smooth line is designed to smooth and reduce frizz, especially for coarse or curly hair. It contains keratin as well as coconut and avocado oil. For fine hair, this may feel too heavy.
The difference in a nutshell:
Keratin Oil = strengthening and protection (for finer hair)
Brazilian Keratin Smooth = smoothness and manageability (for thicker hair)
Hope this helps! 💛