I've had both. First off I will say that sometimes people have issues hearing me but it may be their phones. When I have work calls it's OK, but when I talk to my wife in the car it's in and out sometimes.
Secondly the reason I have the infinim is because the wire on the old model ended up fraying the from hanging out. I love the retractable cord. I can't talk to music quality as I rarely listen to music, it's mostly for podcasts and movies. That being said it is really good for those, and it isolates sound nicely. I use it on NYC subways without any issue. I never have it at the loudest volume.