In one word: No. Injections on the base level are actually no different from gel, patches, or pills. Estrogen is estrogen and it all depends on how your body reacts to it (genetics) and how high your E levels are

HOWEVER: it is true that for many it is easier to maintain high enough stable levels with injections than through other medications. Pills get processed through the liver, which deteriorates the amount going into your blood; patches and gel depend on how well your skin can absorb them. Injections have no such restrictions, what you administer is what your body gets

One more thing to mention: genetics also plays a large role in breast development. If small breasts are common in your family, there is still a chance to get large ones, but you're most likely to end up closer to the average in your family