It has been said that Mozart's music epitomizes grace, elegance and decorum. In his 40th symphony he stepped aside from that characterization and created something dark and noble. This is more like prototypical Beethoven. Here are the first and third movements of Mozart's Symphony No 40 in G minor, K.550.
1. Allegro Molto
3. Menuetto - Allegretto
One of the scores I have for this symphony has a note at the bottom of the first page indicating Mozart had 2 orchestrations for this work. Intrigued, I researched this. Originally the symphony had no clarinets. On 16-17 April, 1791 the Tonkunstler-Societat performed the symphony and apparently they had clarinetists available. Mozart added 2 clarinets and revised the oboes for that performance. This is the version with clarinets.
I've skipped the repeat in the interest of band width.