Which Desktop Environment (DE) did you install? Most likely you would have installed, Gnome, Mate, KDE, LXDE or XFCE. Also possible would be Cinnamon, lxqt, Enlightnement, fvwm-crystal, windowmaker and sugar. Each of those DEs installs bundled with it's own set of default applications - what the DE maker communities decide are their favorites. Individual applications are easily removed or added, and you're not restricted to programs from one DEs default set to another - or to add additional programs not included in the DE. The idea is that the DE includes a basic set of software to be 'up and running' as quickly as possible. If you want to use a Virtual Machine install of Debian to most closely resemble the Pyra's most likely default DE, that can be done. Create a VM with a 1280x720 resolution window. Install Debian and select XFCE from the DE list. From there you can use Synaptic to install a WIDE variety of stuff.