TPRH Sci Workbook editions difference?

[PantherPride]

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I've tried searching for an answer to this but I haven't found anything so sorry if it has been asked. I know that the different editions for the TPRH workbooks cover the same content and are good to use for studying, but do they also have the same questions/passages? Particularly the 2009 and the newer editions? I ask because if they are the different I might get 2 versions. Thanks

 

[Lya]

As far as I know, I don't think getting 2 different versions is unnecessary. I thought they had almost identical questions and passages, didn't they? Even if they do have different questions and passages, I doubt they are drastically different.