I wish they would have listed the differences between them, but, AFAIK, they have not,
and no one else has, either.
The e-book is only available in 2016 version.
I think it should be fine to use the 2016 book, but ideally the 2019 update.
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mentions, replies to inquiries about, and/or involves a discussion of, the information on my website,
ASpoonfulOfMedicine.com, falls under the Disclaimer on my website.
CHP – The Clean Health Protocol
www.ASpoonfulOfMedicine.com/
You will find info there regarding Jim Humble's "MMS Health Recovery Guidebook".