Tonight I spent some time listening to my Ascents and Summits and I have to admit that the olders logans may have more of a "midrange sparkle" (once again, trying to find words to describe sound in detail) than the Summits. However, I'm going to do some more tuning on the Summits such as gradually turn down the bass levels and see if that helps the midrange become more pronounced. It's just so easy to over do the bass on the Summits. One thing nice about the Summits is that they have some tuning capability.