Unlike D3, which is SVG based, this collection of components written by Diamenta are based on HTML 5 Canvas elements. Here is an extract from the IE10 blog that makes a nice comparison:

The following is a high-level summary of Canvas and SVG meant to frame a discussion of when to use one particular vector graphic technology over the other.

A Comparison of Canvas and SVG
Canvas SVG
Pixel-based (canvas is essentially an image element with a drawing API) Object Model-based (SVG elements are similar to HTML elements)
Single HTML element similar to <img> in behavior Multiple graphical elements which become part of the Document Object Model (DOM)
Visual presentation created and modified programmatically through script Visual presentation created with markup and modified by CSS or programmatically through script
Event model/user interaction is coarse—at the canvas element only; interactions must be manually programmed from mouse coordinates Event model/user interaction is object-based at the level of primitive graphic elements—lines, rectangles, paths
API does not support accessibility; markup-based techniques must be used in addition to canvas SVG markup and object model directly supports accessibility

SVG is known as a retained mode graphics model persisting in an in-memory model. Analogous to HTML, SVG builds an object model of elements, attributes, and styles. When the <svg> element appears in an HTML5 document, it behaves like an inline block and is part of the HTML document tree.

Canvas is a bitmap with an immediate mode graphics application programming interface (API) for drawing on it. Canvas is a “fire and forget” model that renders its graphics directly to its bitmap and then subsequently has no sense of the shapes that were drawn; only the resulting bitmap stays around.

One way to think of these is that Canvas resembles the Windows GDI API, where you programmatically draw graphics to a window, and SVG resembles HTML markup with elements, styles, events, and DOM-based programmability. Canvas is procedural whereas SVG is declarative.