I’d say that they will still change.
The S/A bra’s are designed for high impact sports where as in my experience the asda bra’s are more for light impact and they are better post op/wearing to bed.
If your going to do sports once you have been given the all clear I would recommend the S/A, i love mine! They are alot tighter fitting but you real the benefit when exercising. I would recommend that you get the first one fitted so you know how they should feel.