the apple wins
it has flatter freq response,
lower noise lvl (lower the better)
higher dynamic range ( difference between the quietest sound and the loudest, the higher this value, the less 'flat' it sounds)
lower crosstalk, there is less leakage of sound going to opposite channels.
Thank you very much for your response...
BtW where does Nokia 5230 stands as compared to apple and the other ones?