Since the release of the Google Caffeine, some are comparing the results of the new search engine with the old Google search engine architecture.
It takes time and effort for someone to click back and forth just to compare the two search engines. For less than a week, there are some online practitioners and experts who are making some studies and experiments for this new Google service.
To make your studies a little less effort, there are some useful tools to get your comparison a bit faster than doing the manual comparison with the two sites.
First, try using Facesearch Caffeine
Compare where you can check the results of the same subject in side-by-side frames. In here, it’s easier to compare since you both check the results of Caffeine and the old Google search on the same monitor.
Another one is Google Caffeine Bookmarklet, a recently released browser bookmarklet from The Google Tutor blog. In here, you just have to do your search on Google then after getting the results, click for the bookmarklet and it will automatically search for the same topic on Google Caffeine.
For sure, as the experimenting continues, there will be more applications and tools available to help testers compare the two search engines.