We've built a number of reports for a client that are run from the Reports Area, List Area and Record Area in CRM.   These reports, and their pre-filtering, are currently working perfectly. 

Today, the client just asked if we could alter the reports so that when they are run from the Reports area they have an additional filter applied (eg Modified Date from past month).  However, they don't want that filter being applied when the same report is run from the List area or Record area.

Is there a way to accomplish this in CRM?  The only approach I can think of is to upload two identical versions of each report using the following approach:

1) Report 1a linked to the Reports area with a default filter added
2) Report 1b linked to the List & Record area with no filter

Given we have 10 reports, I'd prefer another approach rather than creating 20 report records in CRM.