Search from vs scroll


I have a use case which our customers wants to get the data in chunks.
Currently, I have 2 APIs for that purpose: one which use scroll from & size and second api which is scroll with sort of _doc, and I would like to delete one of them and let the user to use only one of them.
so, I wonder 1. which api is more efficient from performance perspective?
and again, please note that one of the api use scroll with sort of _doc.
2. Is there any ability in scroll that search from doesn't have?


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