What is the difference between Gelatin and Isinglass?

The difference between gelatin and isinglass is that “gelatin” is a protein derived through partial hydrolysis of the collagen extracted from animal skin, bones, cartilage, ligaments, etc and “isinglass” is a form of gelatine obtained from the air bladder of the sturgeon and certain other fish, used as an adhesive and as a clarifying agent for wine and beer.

What is the difference between Aspic and Gelatin?

The difference between aspic and gelatin is that "aspic" is a dish in which ingredients are set into a gelatine, jelly-like substance made from a meat stock or consommé and "gelatin" is a protein derived through partial hydrolysis of the collagen extracted from animal skin, bones, cartilage, ligaments, etc.