Would there be a noticeable difference if I exchanged 410cc implants with 550cc?

Yes, you would gain about a cup increase in size. However, please do not go over the size that your frame and tissue will support. With larger implants, your own tissue is stretched and thinned and will not support the weight over time. You will either bottom out or sag. It might be bet to keep what you have.

With a 140cc size increase you are likely to notice the difference from the implant exchange, particularly if you have a small frame and a high profile implant.