If you continue not to see a difference as your work improves, consider the stance of the companies producing the film and related products. This subject has also been hashed before, but many of us feel that Kodak has forsaken film photography with one or two exceptions. Ilford has come back from bankruptcy and shown every sign of support to film photography that will continue to make them profitable. They won't stay in business if they don't make a profit. Both companies made good film related products. Kodak has dropped many of them to go digital. Ilford has added many new ones including buying Kentmere an excellent photo paper provider. It is your decision. I have made mine.