It is incredibly hard to say what would’ve/wouldn’t have happened for events that have passed. I imagine that they still would’ve lost (US would’ve caught up and far exceeded eventually). The Battle of the Atlantic would have been different. Although the British did develop radar first, the Germans used it far better and far more often than the Allies did. Actually, the Germans used a more advanced radar system that the allies didn‘t come up woth till perhaps the end of the war. The long and short of it is the same would’ve happens because the Germans used it better and more often than the Allies until about 1944.
