Good question, and the honest answer is that it depends on what is creating the look, which I cannot fully judge from photos. If the issue is a true fat bag, a pocket of orbital fat pushing forward, then filler tends to make it worse, and a lower blepharoplasty (ideally repositioning that fat rather than simply removing it) is the better route. If instead the issue is a hollow or a tear-trough shadow with no real bag, then carefully placed volume can help and surgery may be unnecessary. Many people have a mix of the two, which is exactly why a single answer online is unreliable. So before spending on either, I would have an in-person assessment that gently presses on the area and looks at it from the side, to separate bag from hollow from skin. That short examination usually makes the decision obvious and saves you money on the wrong treatment. Best of luck