True but a minor quibble as they merely rebadged the same organization. Cheka, NKVD, MGB, KGB, FSB are all one and the same.
No one in the gulags or any of the captive nations ever said, “Whew, I’m lucky the NKVD got us, and not those other guys.” as the trains chugged north or the weapons were cocked.
Those that suffered under the Soviets called them Chekisti regardless of the official title.
You missed the GPU and OGPU (between Checka and NKVD)... those crazy Soviets and their acronyms!