As a former Paradigm owner, I feel I've got license to reply here.
Although I don't doubt that the Paradigm CC-570 is a fine sounding speaker, the fundamental design of the Axiom VP-150 probably gives it a significant advantage. The standard mid-tweeter-mid design on the Paradigm center tends to create a very directional and focused sound. For the person sitting directly in front of the screen, the sound is great, but as you move further from the sweet spot, the upper sound range rolls off significantly.
The VP-150's design puts the tweeters at the outer edges, which allows the high-frequency sounds to spread over a wider area. Also, the 3 mid-woofers help it more effortlessly reproduce the rest of the audio spectrum.
Keep in mind that I haven't heard either of these speakers, but Axiom speakers are often said as being comparable to the Paradigm reference line -- only they're much cheaper!
