Menus of items appear in different contexts such as drop-downs and panels.
I've noticed in the dialog demo that while the panel version shows no status for hover, the one in the dropdown does. In addition, the color used for highlighting the active state is also different (dark grey vs. light blue).
I illustrated the differences of such states below:
It would be good to document as part of M101 the intended style for list of menu options and the reasons for them to diverge in different contexts if any.