Of the differences, it can be mentioned that GOTS-certified products are made of organic materials, these are products with the Oeko-TEX label, not necessarily – organic cotton may have been used. (This will always appear from the washing instructions in the clothes).
In addition, there are also requirements for the entire manufacturing process for GOTS-certified products, in both production and social responsibility, this is not a requirement for Oekotex products. Here there are only requirements for the substances that are in the product itself and not for the production itself.
If you want to read more about the different standards, you can find more information about GOTS and OEKO-TEX on the links.