3 weeks post op, 620 cc right breast, 630 left breast. Mentor moderate plus saline. Was I botched or is this normal? (Photo)

First of all, you were not "botched" just because you have some asymmetry; this may have been partially present preop, or you may have had things look great on the OR table and be healing and settling differently. You also could have capsular contracture or other issues making the two sides heal differently. At three weeks it is very early and most surgeons will advise you to wait at least until the 3-4 month mark. Sometimes the soft tissues swell differently on the two sides, or the pockets that looked pretty symmetric on the table are not healing the same way. It is hard to achieve perfect symmetry when such a thing does not generally exist in nature, but you should at least discuss your observations with your surgeon and follow guidance on any maneuvers suggested by the surgeon while your result evolves.