Intuitively, you would say that market economy, where the demands of the market ( that is, the consumers!) regulate what is produced and where the producers have to compete against each other, which leads to better quality and lower prices.
However, I find that this leads to manipulation from the producers: creating false needs, using lower quality ingredients to lower the price...and I would say that a mixed economy, where there is some kind of quality control would be better in some cases.