It's not really a question of posing Capitalism versus Socialism as if they were archetypes of social organization that are independent and distinguishable from each other. The Marxist socialist archetype is long gone, Capitalism and history has proven it the loser.
Capitalism however, cannot function without regulation or we wind up with extremes of exploitation. Think the worst of the aftermath of industrial revolution in England, or the 'gilded' age in the US, or the cutthroat economic boom in present day China: Baby milk formula with the nutritional value of sand, toxic toys, blood banks that infect the donors with AIDS. etc.
Capitalism is a force of nature that needs to be contained, channeled. It's not a form of government. The western ideology of modern day Capitalism (not to be confused with the nuts and bolts of its operation) rests on the notion that democracy and freedom go hand in hand with market economy, that this is the wave of the future, and that it will bring light to all the dark places in the world. I remain pessimistic.
It's a question of degrees, not whether or not you redistribute wealth. In Europe we have a tradition of greater redistribution, for instance we view health care much in the same way as the fire brigade or the police; a basic public service necessary for the smooth management of society.