Government built housing vs. Section 8

Which one do you think is better?

Government built housing is when the government invests its own capital to building, operate, and maintain housing for low-income persons. They are usually large tenements in "run-down" areas of town but could be in the form of townhomes or even single family homes.

Section 8 is a department of housing and urban development program which grants rent vouchers to low-income persons in which they can use at any private rental property willing to participate in the program.

Both have their advantages and disadvantages. Both have similar costs. Which do you feel is the more desirable approach to housing and why? Many communities already have a mix, but preference is clearly given to one over the other.>