Who each workflow suits
Start with the deliverable rather than the tool name. A larger social image, a retouched portrait, and an editable campaign asset call for different amounts of intervention.
Choose this when
The image is already composed well, and you need a larger version for viewing or placement.
Start with an image upscaler, then inspect the result at the size people will actually see.
There is little benefit in building a layered project if you do not need selective edits. Check high-contrast edges and recognizable details before using the export.
Choose this when
A portrait has distracting marks, uneven lighting, or a background that needs separate treatment.
Use Photoshop for the local corrections; evaluate enlargement as one step in that edit.
Masks and selections let you address distinct problems without forcing the same treatment onto skin, hair, clothing, and background.
Choose this when
The result must remain editable for a designer, or it includes text and arranged visual elements.
Keep the layered work in Photoshop and enlarge placed images only as needed.
A flattened enlarged image does not preserve independently editable type, layout, or adjustment decisions. Keeping those elements separate makes later revisions more predictable.