Google have a hug database for all so indexed soon in comparison yahoo but yahoo fetch more inbound link in comparison Google so they are working so effectively
As well as Yahoo and Google both have an important role in carrying out your site, but you need to make your site more interesting and unique, so that people can be impressed with the site that you created.
Yahoo indexes incoming links way faster than Google. It actually sees more of them as backlinks, rather than Google.
Google crawler index pages quickly than of the Yahoo search engine, the index pages can be observed by the website file known as Robot.txt.
Yahoo! indexing is over now. Yahoo! has announced to close the siteexplorer due the merger with Bing. Sooner or later all yahoo links and indexing data will be deleted/ transferred.
Very funny. It is because Yahoo! has stopped the services of site explorer.com after the merger with Bing