Personally, I think capitalism is better because I reject the idea that the government is entitled to take things from me or anyone else in an effort to make life more "fair" for other people.
I also prefer capitalism because most of the people who employ people in this country seem to be capitalists who are driven by profit.
I've also noticed that whenever I'm waiting on the government to provide me with any good or service, I seem to wait longer and get crappy service. Government websites are also a lot harder to use than private sector ones.
To make a long story short, government can't do anything that the private sector couldn't do better. If you took away the government power to tax and made federal agencies compete for business in the free market as they are, Social Security and the USPS would evaporate in a year with Medicare and the FDA not far behind.
Socialism is like masturbation. It sounds like a good idea, but in the end, you're just screwing yourself.