Snynapse Difference between THX and Dolby

Hi,

I'm new with speaker and I bought the Razer Nommo Pro.

In the Synapse software there are some audio enhancement options, THX and Dolby. I'm a completely noob and it comes to sound. The dolby is pretty straight forward: I can select music, game or movie depending on what I will do. But when the THX option is better suited? What would be the difference between THX and Dolby when it comes to sound quality? Is THX better for gaming or movie? Is it better to always leave as THX or is it better to use dolby as needed?

Thanks!