Any reason to go with the ER-4P over the hf5 or hf3 product line, if I'm not looking for studio mastering grade audio reproduction? Put another way, judged pur

Any reason to go with the ER-4P over the hf5 or hf3 product line, if I'm not looking for studio mastering grade audio reproduction? Put another way, judged purely on niose reduction is there much difference between the ER-4P and the rest of the Etymotic product line?