There about the same, the mix is a litte stronger for asphalt because there is more penetration needed plus there is alot less runoff as the grit holds it up there alot better. Tile roofs tend to be more slippery and depending on the type of tile, harder to walk on, plus the run off is immediate so you need to tone down the mix and catch as much of it as possible and rinse, rinse, rinse.