From what I read, NCORE (and also UcD) seems to be sonically step above what ICEpower currently offers. But there are other class D manufacturers that are also getting rave feedback, namely Pascal and Anaview. Many people say they are also sonically superior all ICEpower implementations.
I think this is expected, as Hypex, Pascal and Anaview designs are a generation ahead of B&O designs. As Guido commented, probably ICE next generation will get better and may even be sonically preferred over current top choices.
Everyone should try before buying these amplifiers. In many cases, due to upstream components, speakers, room accoutics, etc, the difference between a good ICEpower and an NCORE amplifier may be unnoticed.
Finally, and very important to notice, class D is still evolving. In two years we can expect a new performance jump from several of the many designers. In this scenario, it is critical to try before buy, and maybe target to at least a two generation jump upgrade.