The following are just some articles, blog entries and forum posts on the topic of comparing these two cameras, for those interested in some other perspectives and experiences. Naturally, especially in the case of forum threads, don't believe absolutely everything you read.
ProVideoCoalition discusses the cameras
Philip Bloom on the topic
And here are a fellow pro's thoughts and rationale for choosing the HVX over the EX1 as his next purchase.
Various Forum Threads:
EX1 vs. HVX for Narrative Work
EX1 vs. HVX Shootout at Creative Cow
HVX fanboys getting hated on at Creative Cow
More Discussion at Creative Cow
Light Sensitivity Discussion at Creative Cow
Discussion at Apple.com
Finally, the following link is footage of a side-by-side shootout of the two cameras of various scenes and calibration charts.