As
THC-9 vs THC comparison shows, it is vital to realize that those names may relate to the same cannabinoid in colloquial conversation about products. Delta-9 THC or THC is an intoxicating cannabinoid present in cannabis and is famous for providing its users with the high experience.
The difference lies mostly in labeling and advertising of those products. While THC is commonly referred to as a general term for tetrahydrocannabinol, THC-9 is used for the Delta-9 THC specifically.
It is essential to consult the labeling and local laws before buying the products and know the cannabinoid composition, concentrations, and serving sizes to expect possible effects of the product.
Having known the terminology will help you make more informed comparisons.