The Sony HDR-CX700? What an odd choice of a camera to compare with the FX1. They really aren't the same thing at all. In fact, they are so different that I couldn't find any site that directly compares them, but Slashcam lets you compare any two cameras in their database. I'd post a link, but the page generated by the comparison comes from their database and so cannot be linked to directly. However, here's one section, with the FX1 on the left. This tells at least part of the story, namely that the FX1 is aimed at professionals, and provides a huge number of manual adjustments (although not as many as the Z1).

Focus switcher ?    Yes  No

ND Filter ?         Yes  No

Exp Lock ?          Yes  No

Gain ?              Yes  No

White balance ?     Yes  No

Push AF ?           Yes  No

Audio Levels ?      Yes  No