We have just started SOTW. My understanding was that History Odyssey used the SOTW read aloud book in some of their lessons. I heard that SOTW was from a Christian view (cross referencing the bible) and that History Odyssey was totally secular. I have yet to find any chapter that is religously bent in SOTW, but they have mentioned the city of Jericho. Like I said, we just started it.
I believe SOTW was developed first and History Odyssey was written afterwards, using some of the SOTW text.
In SOTW, we read a chapter (or portion of one), do narration and answer questions verbally, talk about what we read etc. We have the activity book that outlines all that for us. We also look in our local library to see if it carries any of the additional reading suggestions (both fiction and non-fiction) and do some of the activities (map work, crafts, coloring etc). We also read from the Usborne history encyclopedia, which we also own. I really like the Usborne encyclopedia. It is internet-linked so we can find computer activities to do if we are so inclined to. It just further cements the information into their minds. It also cross-references the Kingfisher history encylopedia. All these are suggested in the SOTW activity book.
I really like SOTW so far. For a history idiot, it is proving really interesting to me!! I wish I'd have learned history like this. SOTW is not a subset of History Odyssey.
SOTW has 2 books for each year....the read aloud text and the activity book. The activity book has the narration exercises, additional reading suggestions of encyclopedias, history books, and fiction, as well as hands-on activities, crafts, mapwork, & coloring pages.
I have heard fabulous reviews from both History Odyssey and SOTW.