of course Google is more reliable than yahoo but I think Both very good search engine. it is depend on your thin if you think Google is best than use Google otherwise use yahoo..
Unfortunately google is much better than yahoo, I would love to that google gets a competitor. like that is so boring.
Google as it's got more features to it and most of the web traffic comes from it so I always optimize my sites for Google instead of Yahoo. I hardly ever get any traffic from Yahoo in fact. Google offers so much more to it, and provides better more accurate results in my opinion.
I cannot see the logic in some of these stupid questions,all i can think its some young kid trying to be a adult but failing miserably.
Google is better always becoz frequently the yahoo site explorer was shown error for webmasters tools linked. thanks for Google service