The template used in https://rpeactual.com/2014/07/17/deploying-templates-in-rrcdng/ has been enhanced to support reporting from a specified baseline of a module and not just from the current version. The modified template can be downloaded from the RPE Wiki: CLM Templates page.
You can use the template in standalone RPE or deployed in DNG. In both cases if you leave the snapshotId variable empty the report will be made on the current version of the module. If however you provide a valid baseline ID the document will be created with the baseline’s data.
See https://jazz.net/wiki/bin/view/Main/RRCReportServiceFAQ#How_can_I_generate_a_report_from for information on how to obtain the ID of the baseline ( or snapshot).