I guess studying niche overlaps - you will demonstrate that it help both species in an concervation effort. But It might also demonstrate the small differencies which also are important to know and to be implemented in a conservation actcion plan. As they have large niche overlaps I also think it demonstate that area use is important and for the two to coexcist it will require larger management areas to secure them both. Good knowlegde on speices niches are always a key to good management,