clavier trio 1017

What in this piece tells me it is Bach and not let's say Handel or Telemann? Do I hear any harmonies that remind me of the little piece that is moving into my head and hands? How he does use diminished chords, and augmented sixes. My harmonic analysis skills are diminished in the extreme these days. But I sorted through the thickets of Fuga 1 as best I could, finding the parallel ideas in various measures. Marveling again at the dissonances that played alone are jarring but in context merely provide a vehicle to get from one place to another in an interesting way.