Here's one of those points: Radio, Television and other electronic media are, essentially, the same medium!
Indeed, this element is about what happens to an audience's cranial regions when they are accessed by electronic media - radio, television and computer-like devices.
Neurologists-with-money-to-burn and their lab-rat, undergraduate students have demonstrated - time and again - that the brain-activity of someone who is exposed to radio and/or television commercials is the same, but different when the same audience is exposed to Print-ads or or engaged in other, real-life experiences like: when being recruited for "significant research studies where you can make a wonderful contribution to science and humanity."
Given those, the differences between radio and television are, actually, quite slight - but significant. 1.) Television supplies visual images directly to the audience where radio constructs those images internally. 2.) Television has limited target-audience opportunities. 3.) Radio stations have loyal audiences that are available regularly, and 4.) Radio is a whole lot cheaper. Cheaper to produce Creative and cheaper to reach an audience and for longer periods of time.
For the most part, however, advertisers and radio-people treat their medium as "Newspaper-Of-The-Air"! They create commercials that are more like newspaper ads that are just read out loud.
As has been demonstrated consistently, electronic media work best when emotions are engaged with content being secondary. In other words: supplying pure information about a product or service through electronic media is a huge waste of time and resources and the least efficient way of influencing an audience!