Tonality is the perceived spectral balance: warm (boosted low-mids, recessed highs), bright (boosted highs), neutral (flat), dark (recessed highs), thin (lacking low-mids). Musicality is subjective — it describes a quality that makes music engaging and emotionally compelling, often from subtle harmonic richness and dynamic expression that pure accuracy measurements miss.
A system can measure perfectly flat (accurate) yet sound unmusical (sterile, fatiguing, uninvolving). Conversely, some technically imperfect systems (tube amplifiers, vinyl) are described as highly musical. The gap between measurement and perception is where psychoacoustics and personal preference live.