Final Fantasy 7 Remake: What parts of the story are new and what was in the original?

As comparing the original and remake to identify what was in both games would serve difficult, I am only including an overarching view of new or changed story/gameplay content that only exists in the remake.

The content below references this guide, as well as information that stems from my playthrough of the original FF7 many many years ago. These are likely not all of the changes, but it's a good start.

Characters

• The members of Avalanche - Jessie, Wedge, and Biggs - have much more screen time in the remake than the original. Chapter 4 consists of a lot of original content surrounding these members.

  Additionally

• Chapter 4 introduces an original character Roche (SOLDIER 3rd Class)

• Chapter 3 introduces an original character, Chadley (Shinra research intern).

• Chapter 9 introduces original characters, Andrea Rhodea, Madam M, Chocobo Sam, and Leslie Kyle.

• The mysterious Whispers that follow Aerith around the entire game are brand new.

• Sephiroth makes his appearance much earlier than in the original

Side Content

• Chadley introduces new "research" activities to obtain various types of materia, including summons
• Wall Market introduces new mini-games, such as dancing, pull-ups, and squatting
• Wall Market introduces Corneo's Colosseum, which consists of battle challenges and rewards
• Various towns include "odd-jobs"(or side quests)