I have looked for this and haven't seen it, but would be very useful SEO tool. To simply create a side by side google search tool. Often times i will search for 2 (related) keywords and i want to inspect if google is showing different search results between them. For example: Right now i have to manually compare them, but would be great if someone built a tool or site which lets me search and display 2 keywords and in a tidy way would visually compare them side by side. Even better would be to add in metrics to show how many url's appear in both searches, and possible other metrics... Thoughts?