Is there performance difference between multiple “$set” and a single “$set”

The data in mongodb is like this

{
    "_id": "1",
    "a": { ... },
    "b": { ... },
    "c": [ ... ],
    "d": [ ... ]
}

I can update the document using a single “$set” operator.

db.collection.update({"_id": "1"}, {
        "$set": {
            "a": { new dict },
            "b": { new dict },
            "c": [ new list ],
            "d": [ new list ]
        }
    })

I can also update the document using multiple “$set” (each field has a “$set”).

db.collection.update({"_id": "1"}, [
        {
            "$set": { "a": { new dict } }
        },
        {
            "$set": { "b": { new dict } }
        },
        {
            "$set": { "c": [ new list ] }
        },
        {
            "$set": { "d": [ new list ] }
        }
    ])

I would like to learn if there are any performance concerns on the mongodb end by using the “multi-set” version. Is it Ok to use the “multi-set” version if, for some cases, I need to.