Call Activity VS Rest call

I know use cases of both of them, I am trying to figure out all Pros and cons of calling a sub-process with Rest call (http-connector) over Call Activity. Response is appreciated

One clear difference is that if you use a Call activity it gives a definitive parent-child relationship to the called process.
So you can use Error and Escalation events to inform the parent process of events from the child.

Also Call Activities are synchronous so once called by a token, that token will not move forward until the call activity has finished.

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