You can think of each gate in the Throat Center as a different "voice". If you have one of these gates defined, then that is a "voice" you carry consistently and in a fixed way. Take Gate 23 for example. Whether you have it defined as a Conscious Gate or a Subconscious one, a "voice" you regularly deal with is, "I know or not". You will often be called/compelled to speak on what you know or to hold your tongue. And you will experience this in a fixed manner. It'll be largely consistent in the way you experience this.
The Solar Plexus is emotional/spiritual/relational energy that works as a wave, which means they work OVER TIME. These waves inspire action and awareness. There are cycles you have to go (and work) through. Clarity only ever happens at the end of a cycle/wave. Emotional awareness itself is all the highs and lows. It's the entire wave itself. Emotional awareness is a PROCESS. To be emotionally aware is to be aware of the emotional process(es) that you go through. It's not just one instance, it's every instance. It's a whole range of instances.
Here's an interesting fact about Undefined Centers. When you have one, it stores energy up until a person or transit defines it. On top of that, undefined centers are areas where if you are around someone with that definition, you'll experience that energy in an amplified way.
There are 9 Energy Centers depicted in a body graph in Human Design. They are mirrored after the chakras and tree of life. They are the Head, Ajna, Throat, Will/Heart, Sacral, Emotional Solar Plexus, Splenic, G/Identity, and Root Centers.