I'm not familiar with Jommelli, though I do know the Michael Haydn Requiem (influenced Mozart's), the Bruckner Requiem (modeled on Mozart's and in the same key of D Minor) that he wrote at age 24 and revised later in life, and even the Salieri Requiem, which has some great vocal writing! Gee Whiz; the Jommelli Requiem was written in the year of Mozart's birth! How weird is that? I will listen to it. My Requiem is MODELED on Mozart's unfinished Requiem, if you listen closely and see how I broke out the text. It does not SOUND like Mozart, except for the occasional turn of phrase.