If you can find any measurements say on a Steroephile review to compare, teh impedance and frequency response curves would probably tell one the most about how the two sound different.
What sounds "Better" to an individual is purely subjective. No specs alone will tell you that.
1db difference in sensitivity spec only means that one will be slightly louder louder than teh other all else being equal so not much to bank on alone there.
What sounds "Better" to an individual is purely subjective. No specs alone will tell you that.
1db difference in sensitivity spec only means that one will be slightly louder louder than teh other all else being equal so not much to bank on alone there.