dnf vs yum groups information

[nonamedotc]

dnf and yum are showing different information for the command {dnf/yum} 
groups list.

Particularly, not all the DE/WM seem to be listed in dnf output but it 
is listed in yum. I am just wondering if this is a bug or if it's 
intentional. I would much appreciate it if someone can point me to 
relevant documentation.

Thanks!

# rpm -qa dnf
dnf-0.4.7-1.fc20.noarch


Here is what I get

# dnf groups list
Installed Groups:
    LibreOffice
    Editors
    Electronic Lab
    Milkymist
    Network Servers
    Office/Productivity
    Security Lab
    Text-based Internet
    Graphical Internet
    Sound and Video
    Hardware Support
    System Tools
    Fonts
    Design Suite
    Development Tools
Available Groups:
    Fedora Eclipse
    FreeIPA Server
    Educational Software
    Engineering and Scientific
    Medical Applications
    Robotics
    Window Managers
    3D Printing
    GNOME Desktop Environment
    KDE (K Desktop Environment)
    Games and Entertainment
    Administration Tools
    Authoring and Publishing
    Books and Guides
    Cloud Infrastructure
    RPM Development Tools
    C Development Tools and Libraries

======================================================

# yum groups list
Loaded plugins: langpacks, refresh-packagekit, remove-with-leaves
Available environment groups:
    GNOME Desktop
    KDE Plasma Workspaces
    Xfce Desktop
    LXDE Desktop
    Cinnamon Desktop
    MATE Desktop
    Sugar Desktop Environment
    Development and Creative Workstation
    Web Server
    Infrastructure Server
    Basic Desktop
    Minimal Install
Available Groups:
    3D Printing
    Administration Tools
    Authoring and Publishing
    Books and Guides
    C Development Tools and Libraries
    Cloud Infrastructure
    Design Suite
    Development Tools
    Editors
    Educational Software
    Electronic Lab
    Engineering and Scientific
    Fedora Eclipse
    FreeIPA Server
    Games and Entertainment
    LibreOffice
    Medical Applications
    Milkymist
    Network Servers
    Office/Productivity
    RPM Development Tools
    Robotics
    Security Lab
    Sound and Video
    System Tools
    Text-based Internet
    Window Managers

======================================================

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nonamedotc