Glory Dami, III, The Texturally Complex Variation

In Variation III, we see nearly the exact same underlying chordal structure as we do in the original theme. Some of the chords are spelled differently, and the section of transition back to D major is not exactly the same, but overall, the chord progression is the same. The piece also changes keys at the same times and you could almost sing the theme underneath the third variation because we can still hear it. Where I have highlighted in both yellow and pink, we see that we have the exact same chords in the base. This entire variation is an extremely embellished version of the theme. There are twice as many notes per measure in the right hand in the third variation than in the theme, yet the tempo remains the same making this a very impressive section. The overall mood is relatively the same, yet the third variation gives a bit more suspicion of what will come next, maybe due to the immense amount of notes and Mozart's elaboration to the theme that is still lingering in our minds.
ADDED:
The function of the bass is much different in this variation, often containing appoggiatura ending with a leading tone occurring multiple times. It is a much more sudden feel with communication between the two lines rather than moving together like in the theme. The form is the same as the original theme with the exception of one extra measure.