I'm working on a flooring project on the first floor of my 70's built split level home. The foundation is concrete slab with a wood subfloor (2/4 sleepers with 1/6 planks) above that. Currently, I have some of the boards pulled to deal with a mold issue.

I'm at a point where I can't decide if it'd be better to pull the subfloor and put in finished flooring on the slab itself OR repair the subfloor that we pulled and put our finished floor on that.

Now for the question. Given the option of using the slab or wood subfloor, what would you do? We are very open to the types of finished flooring that we use, so take that out of the equation. What is the benefit of using one over the other?