A casino operator runs the site and manages your account. A slot provider makes...

https://wiki-byte.win/index.php/What_Does_Art_Direction_Mean_in_a_Slot_Game%3F

A casino operator runs the site and manages your account. A slot provider makes the games. Provider names show who made a slot and help you find other titles by that studio. Visuals and sound may differ, but they do not change the game rules.