IE NetRenderer vs TestCafe Studio

IE NetRenderer is a free web service and extension for checking how pages render in Internet Explorer 11, 10, 9, 8, 7, 6 and 5.5. It runs capture jobs in parallel and in real time, using a separate virtual Windows environment for each browser version. Mixed Overlay and Difference Mode compare screenshots between versions. Screenshots remain at their original size, with a ruler showing usable widths for 800x600 and 1024x768 displays. You can set a vertical pixel offset to capture a lower page section and optionally allow extra loading time for scripts and page objects. Java and ActiveX are blocked, while JavaScript is enabled. The Firefox extension sends the current page from browser menus or toolbar icons. The maker says images and URLs are private, images are deleted after viewing, and visited sites do not receive identifying browser details. The rendering server is in Germany.

TestCafe Studio has no write-up on Specifiction yet; its figures are above.