Is there a visible difference between 505 cc and 560 cc breast implants?

Thank you for sharing your excellent question.  It is possible that 50cc will be noticeable even at the sizes you are looking to employ.  Best decision is likely to try on the sizers of that range so that you can get a better visual representation of what each would look like.  Hope this helps.

Tall women with larger frames and broader chest, shoulders, and hips can often handle larger implants that would make smaller women's chests look overcrowded and heavier. None of the modalities to approximate final results from breast implants are 100% accurate; they merely facilitate the patient and the board certified PS concurring on the size and type of breast implant which will come the closest to reaching the patient's goal. My patients prefer to try on the sizers under garments they typically wear to determine if they fit as expected and help allay some of their trepidation associated with this decision.
Have another preliminary conversation with your PS and ask to try on a profile bra with silicone moderate 505cc and 560 cc sizers under a tailored blouse, tight sweater, swimsuit, workout clothes, tank tops, and other garments you typically wear so that you have the best idea of whether the garments fit as desired with the implant selected. The most important clinical factor in determining breast implant size is the base width or diameter of the patient’s native breast. If the patient would like more volume to obtain a larger cup size, the implant profile can be shifted from a moderate profile implant to higher profile implant. I would recommend that you go with the size that boosts your self-esteem, and fits your anatomy.  Choosing an implant based on an aesthetic goal that exceeds your anatomic capacity may lead to complications and possibly revision.