Radio buttons or Dropdown for same list of options

I have a list of options where the maximum number that can appear is 9. I am wondering if it will be confusing to switch controls for these options depending on how many appear i.e. use radio buttons for 5 or less, use dropdowns for 5 or more. I am leaning toward using radio buttons across the board for consistency, even though 9 options at most can appear (though this will be in rare cases).

Here are some wireframes of the width of the space I'm working with (537px)