Which json format to use in a prompt?

Is there any evidence that a json structure holding mostly text information is more useful if provided using json.dumps(myjson, indent=2) or perhaps formatted as a paragraph or table as opposed to a simple str(myjson)? I can see arguments both ways, depending on how much gpt finds the ‘\n’ useful in ‘understanding’ the content, which in turn depends on its training corpus.

No flames or off-the-cuff ‘it can’t make any difference’ answers, please. Has anyone actually tested or know of decent tests that have been done?