I own both a pediatric ultrascope and a littmann cardio III. I work with peds, and a majority of them are cardiac kids that have murmers and other funky heart sounds. I can hear everything with my ultrascope, sometimes even better, that I can hear with my littmann. My ultrascope is so light weight compared to the littmann, and you can design it however you want it to be. I think the ultrascope has less of a chance to walk away, since you can personalize it. I could recognize my scope from down the hall! I love my ultrascope, and really hardly use my littmann. Sorry I can't comment between the scopes you are questioning, but I can tell you my ultrascope was worth every penny I spent on it!