Will 335cc and 400cc make much of a difference to my asymmetry? I currently have 300/320cc. (photos)

Dear stephanie2304,
women’s breasts have some degree of asymmetry. Some may be more noticeable than others. If you have breast asymmetry before breast augmentation surgery, there is a great chance that this will exhibit right after the surgery.If the asymmetry becomes more noticeable after breast augmentation surgery, a revision may be needed to correct the asymmetry. In most cases, the revision involves correction in both breasts. For example, large breasts can be reduced to a more manageable size, but the amount of reduction might differ between each breast if one happens to be naturally larger than the other. The same can be said if a person wants to augment their small breasts to a larger size: one might be augmented more than the other.Also, you should wait until after 6 months when your implants have completely dropped and fluffed into their final position. You should discuss your concerns with your plastic surgeon. Make sure your surgeon understands your goals. 
Daniel Barrett, MD

Although I understand your desire tor receive online advice, I think you will find online consultants will never will not be very helpful in this regard. These types of decisions are best made in the operating room after the use of temporary sizers, in my opinion. Therefore, I think it is helpful to have a full range of breast implants available ( different sizes and profiles) to allow for intraoperative decision-making.   Also, keep in mind that adjustment of the surrounding breast implant capsules may be necessary to improve breast symmetry, in some cases. My best advice: careful selection of plastic surgeon and careful communication of concern/goals.  Best wishes.