I am looking at upgrading my bookshelf speakers that sit atop my sealed sonotube bass bins and looking at available offerings I began to wonder how much difference there was in sound between the Arx A1b bookshelves/A2c center and the Carnegie Acoustics CSB-1 bookshelves/CSC-1 center, and just how the audio signature would be different. Clearly, the cabinets are finished differently, however, both use a quality 5.25" midwoofer and planar magnetic tweeter, though the Arx tweeter is from an unknown maker (perhaps BG as well?). Even the cabinet weights are nearly the same. The 'voicing' of the crossovers are surely different, but how so? Am I missing something else?