Adam Wilt reviews four HDV camcorders on DV.com (registration required): the Canon XL H1, JVC GY-HD100U, Panasonic AG-HVX200, and the Sony HVR-Z1U:
The Canon XL H1 was the resolution champ amongst the 1/3" cameras, with a crisper, visibly more detailed image than its compatriots. To my eye it showed slightly more noise than the HVX200, with the noise being a fine-grained luma noise compared to the HVX200's slightly softer, more chroma-oriented noise. I preferred the Canon's noise signature as being less video-like, but Barry preferred the HVX's noise for exactly the same reason--you'll want to judge for yourself. In any case, there was potential to reduce the visible noise in the Canon's image that we didn't explore; we'll have to do that in a later test.The Canon clipped highlights a bit more harshly than the HVX did; it was comparable to the Sony as best I remember. Again, had we set the Canon's knee to "low", we might have eked out a small increment in usable highlight detail; how much so I can't say. Something else to test on another day...