What is the difference in taste between stock and broth?
Even though I think they are essentially the same, based on general practices while you’re making stock you’ll end up with a high gelatin content, it will be thicker than a broth, as you tend to use mostly bones.

Stock is generally cooked and reduced longer compared to broth, so I would say stock would actually be more flavorful. However as you have noted, broth also involves seasoning and stock is on it’s own for later usage... They might have different flavor profiles based on how you cook and season them.