Phosphor bronze is generally considered the more versatile acoustic string material because it balances warmth, clarity, projection and tonal complexity across many styles. Many fingerstyle players prefer it for its balanced mids, warm response and harmonic richness.
80/20 bronze is extremely popular for aggressive strumming because it provides strong projection, crisp articulation and a bright acoustic presence.
In most cases, phosphor bronze holds its tonal balance longer, because the phosphor helps improve corrosion resistance and tonal longevity.