Taken from Paper.js' site: An open source vector graphics scripting framework that runs on top of the HTML5 Canvas. Taken from Two.js' site: Two.js is renderer

Taken from Paper.js' site: An open source vector graphics scripting framework that runs on top of the HTML5 Canvas. Taken from Two.js' site: Two.js is renderer agnostic enabling the same api to draw in multiple contexts: svg, canvas, and webgl. There are many differences in addition to this, but this starts to give you an idea.