Another difference is that the kanji are in a larger font than the vocab, but that’s pretty subtle.
Does anyone remember if it says “radical”, “kanji”, or “vocab” on the screen anywhere during the reviews?
I’m not a scripter myself, but I think this sounds like something that might be able to be addressed with a script. @Sheba if you have specific suggestions for how to improve the visual cues, you could ask if someone would make a script for you to change the appearance.
(also tagging some scripters: @rfindley, @Kumirei, @seanblue)