Will a second fat transfer help my uneven breasts? (Photo)

I’m a little over a year out from my breast lift+fat transfer to both breasts. I’m not sure exactly how much fat was transferred, but more was put into my right (smaller) breast, though not much of the fat stayed. Maybe half cup size increase to both. Will a second round give me a fuller lower breast? To make them match. Maybe not perfectly, but more lower volume would be nice. Or would implants be the only way to go? My breasts are about a cup size different.