I see now and thank you. To answer your question, there is no "best choice", just the right one for each person and case. If you read the description the 48 GB version contains several old and new driver versions for each device (for just in case scenarios), cause sometimes old drivers work better than new ones or new ones don't even work at all.
So if you do PC Setting up as a profession and won't have internet where you setting PCs up, it's better to have all available options so go for the 48 GB. If you don't do this professionally and only have a couple of old PCs here and there, stick with the 24 Gb and newest one.
Ultimately your needs will define which one you will get.