I listened some this morning. The highs sound great -- very airy and not as crushed as they used to be. Little else has changed to my ear.
I love the Omnia family of processors but I'm not exactly sure why The Q decided to upgrade. They were already rocking a perfectly good Omnia box and honestly, Omnia boxes are manufactured in such a way that they typically sound pretty similar, unless you go with a highly customized setting like Kiss FM (which is arguably the best-processed station in Birmingham). The Q is in a competitive position that they could even get away with an Omnia One at a third of the cost and still sound great. Maybe they had a good reason to upgrade related to their HD feed or something.