Loeschhorn - Study in F Op 65 No 25
An excellent performance will have poise and elegance. It will never be rushed or heavy handed. The phrasing will have delicacy and refinement.
A good performance will be musically shaped and show variety in tone and dynamics. Its character will be expressive but without the same degree of tonal refinement and finesse.
A sound performance will be solid and at a good tempo. The left hand may well be bumpy and the detail not yet developed. Shaping may not yet be readily shown and the playing will appear somewhat dull perhaps.