Pocket Vienna (2020) or Vienna & etc (2019)

Considering that you will use the kindle edition , take the full book . There is more detail than the pocket version , but both will cover Vienna's major sites . I do not think any changes in prices should be a consideration . After all , you will have gone far to go to Vienna , and missing a site due to the cost would be unwise .

If it’s only that prices are a couple Euros too low, I agree that we’re likely better off with the more comprehensive (2019) guidebook. But is that the case? In other words, is the pocket (2020) guidebook essentially a cut-and-paste of relevant elements of the 2019 book?

Sorry , I thought you were referring to the admission prices , not the price of the books . The pocket version is , indeed a " cut and paste " incarnation . Showing my age , it is like a " Reader's Digest Condensed Book " of the fifties and sixties .

The only way to get accurate admission prices is to go to the web site of the attraction. For a guide book, Buy a used Michelin Green guide to Vienna on the web. Its the best guide book and its cheap, being used (there is no current edition).

There's very good information on this website about how the guidebooks differ. Go here and click on "Is This the Right Book for Me?"

Just noting that while 2020 versions of any of the guides might be fresher, its still based on data and information that may have been collected over at best a year ago, due to the time it takes to write and publish a new edition. I don't think you can ever take the price information as anything other than an indicator of the relative cost.