I use Hodgdon, Ramshot, Barnes, Alliant, Nosler, etc. basically compare everything I can get my hands on. What they publish online is the same as their books. I will consider individual loads, but generally only if I can compare to bullet or powder manufacturer published data. Or, alternatively, I just use a more robust workup to their loads. But to your actual question, I have not subscribed to either, but what I have seen, Loaddata is simply a sampling of the published loads, just in one place.
