Generally, if you going to factory reset win 10, its better idea to clean install win 10 as it is less likely to break the install. Resets have been known to go too far and remove windows completely.
I always suggest a clean install over one.
its also faster as deleting partitions only takes a few minutes. beats wiping them the slow way, same result. And if PC is an old OEM (from a big brand) you might gain hdd space back as they might have extra partitions full of old files you don't want anymore.