The Best 2D Era Sonic Music

Sonic Music and Gameplay Comparison.
This originally was going to be a comprehensive comparison of my favourite music and zones in Sonic 2 and Sonic & Knuckles alongside that of Sonic Mania's remastering and reimaginings, with some honourable mentions I would have liked to see in Sonic Mania. However, it was not to be as my xbox would not upload a vast number of hours of captures and it became too big and complex a project.
But I hope you enjoy some of my favourite tunes and zones from these classic games and I have included the mania comparisons with two of the very greatest - Flying Battery Zone and Chemical Plant Zone.
Let me know if you would like to see the aforementioned comprehensive version and I will consider attempting it with better capture hardware and software.