He compares engines, he said about it when started, that it wont be about language details and implementations
— NoSQL is not an engine SQL is not an engine
— SQL is specifically only a language
— So you literally can not compare it to anything else outside the context of a language
— I dont understand what you dont like, look at the caption it says what is noSQL? From Wikipedia: A NoSQL (originally referring to "non SQL" or "non relational") database provides a mechanism for storage and retrieval ... bla bla bla.