How does fresh basil compare with dried basil?

Both. Basil is a plant with fragrant leaves that can be picked and used fresh, or picked and dried for later use.

Converting fresh to dried herbs is always 3x as much fresh as dried OR 1/3 as much dried as fresh. For example, 1 tsp. dried can be replaced by 3 tsp. fresh (which equals 1 Tbl. fresh). Conversely,...

uh basil..... moron

The usual substitution is 1 teaspoon dried (chopped or crumbled) dried herb in place of 1 tablespoon fresh.

You can't substitute the two. Fresh basil has a totally different flavor profile than its inferior counterpart in the dried version. Dried basil on its own almost can be compared to the taste of...