A Special Chorus is played loud and in your face.
To give it even more attention, you can also change the chord progression.
Instead of sticking with the blues form you can add a couple of bars.
Play the riff in the first two bars of example 2 three times, end with the chord in bar 3 and play a fill in the rest of bars 3 and 4.
Continue with bar 5 of a regular blues (the IV chord).
You need to push up the three note chord you’re playing in the beginning of bar 1.
Don’t push all the notes up a whole fret (good luck to you), just a little tension will give you the blues.
For a great Special Chorus listen to “The Hustle is On” and “Strolling with Bones” by T-Bone Walker.
Every chorus is right on the money.
“Okie Dokie Stomp” by Clarence “Gatemouth” Brown is another good example as is “Lowdown Dog” by Rod Piazza & The Mighty Flyers.