There is no difference in a hand poured (not many hand pour anymore) or hand injected bait over a name brand. It all depends what plastic the person uses (soft, medium, hard, blend).
If you want very soft baits, you can get in touch with a custom bait maker and they should be able to make what ever you want in softness, salt, color, scent, etc. Just rememcer softer means less durable.