There really isn't a way to see what is exactly included. A friend of mind found out the 29.1 included a key update for VZW for Apple Watch Series 3 activation.
Here is the Apple article: Set up and use cellular on Apple Watch Series 3 (GPS + Cellular) - Apple Support
RJLweb Software updates can be viewed at this link:http://vz.to/1S1H0cO If this is not a software update we would not have a way to find out what it is.
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