If you want to compare overall, then Apple easily wins. Apple is clearly the most dynamic, innovative company with a solid track record of not only growing fast in its current markets, but of wild success in new markets.
“If you want to compare overall, then Apple easily wins.”
Most valuable company? There are many many companies that are more valuable.
According to this story - http://money.cnn.com/2010/03/29/technology/apple_valuable_companies.fortune/index.htm
Apple is the 4th most valuable in the US. Behind Exxon, Microsoft, and Wal-mart. Apple might be able to take over Walmart if their stock price shifts. They have no chance to take over Exxon.
Valuations can be fleeting though. As per this article AOL was work $163 Billion 10 years ago and is now work $2.7 B