Yeah, it does make a difference.
The larger images are not sized-up from the small, but sized down in the user's Instagram app, from what the camera captures.
The larger files do have more detail.
Damn she removed them already.
This is why i keep asking people to save the original files and not the low resolution screenshots.
Again, it really doesn't matter. whether 640 or 1080, they are shot on a potato and won't give you more of the detail you want just a soft image.