kde and gnome applications?

I installed opensuse with kde then I’ ve installed gnome desktop environment from repo. There is a lot of applications, some of them is for same purpose. For example there is a console for kde and for gnome. I confused. How can I manage these lot of applications. Should I use kde applications in Kde? Is that matter?

Better use kde apps in kde or gnome apps in gnome, but it actually doesn’t matter. You can use gnome apps in kde, or kde apps in gnome if you want.