The Quarry code base is much cleaner than tsreports', so it would be good to try and merge them together. Tsreports has some features that are not in Quarry though. From the top of my head:
- Actual reports: not just SQL output but formatted reports, with wikilinks etc
- Overview of available reports
- Smart caching (re-create report if viewed after a certain period of time)
- User-friendly interface (SQL is not relevant for most users)