Different fields could be simply due to different layouts used. Also there is no version control or automatic transports for the queries, so who knows what you might have where. (E.g. we don't even do queries in DEV, we do them straight in QA; different companies handle this differently.)
You can use the FM RSAQ_DECODE_REPORT_NAME to find the user group and query name by the report name. WORKSPACE is the query area (Global/Standard). Here is an example for s standard area query:
