Have just installed the Dev Channel version of IE11 and noted that the dev channel version contains additional ticks for:

Input (was 5/20, now 7/20) * Gamepad control

Storage (was 26/30, now 30/30) * Database storage - Objectstore Blob support - Objectstore ArrayBuffer support

So, previous IE 11 score: 372/555, IE 11 Dev Channel score: 378/555.