The main difference between these clients and SwiftGraphQL is that SwiftGraphQL tries to abstract away GraphQL in favour of Swift language feature.
`relay-swift`, for example, relies on query strings which doesn't bring type-safety to your code;
`graphaello` is indeed very similar and I've tried using it before creating SwiftGraphQL. One of the goals of SwiftGraphQL was to let you easily separate the model from your queries. That's why we let you do complex logic in the selection itself. Otherwise, you'd have to first create a utility struct and then translate it into a model-type. I think that's the main difference between graphaello and SwiftGraphQL
Thanks again for sharing the links!