I'm considering purchase of a JVC GY-HD200ub. But for second camera and handheld situations, I have access to a Sony HVR-V1u (shooting 1440x1080 - I do not own this camera). I'm curious how well the image quality of the JVC and Sony would blend. Image matching has been very difficult between the Sony and my current Canon cameras. I prefer not to commit to a Sony model (such as PMW-EX1) just because of access to the smaller Sony which would be better suited for handheld situations.

Also, I'm not finding whether the JVC shoots 1440x1080i or 1920x1080i?

Can't comment on how the pictures would cut.
But jvc is 720p. That makes it hard for some nle's to have both in the same timeline, without prior conversion.

Since both cameras are capable of capturing 1080i60i (only thru firewire on the hd200) I would think you'd be able to cut shots together alright...

Also, I'm not finding whether the JVC shoots 1440x1080i or 1920x1080i?

TECHNICALLY the JVC SHOOTS 1280 x 720 Progressive and then upscales via the Firewire port to 1080i. I would ASSUME that is 1440x1080 interlaced.

Any experience with comparison of color and other image attributes? As I've never used a JVC - like, for example, the Canon image is skewed warm, dark and more saturated relative to the Sony image (and vice versa). Any insights of how the JVC image qualities might compare relative to the Sony? And how readily adjustable differences would be in post? Thanks!

well everything is warm compared to Sony. That being said the color is fairly adjustable. Make sure you have a real whit card to pull a balance and work from there. I'm going to cut this week a Sony 2100 and jvc hd10 and jvc hd110, all different formats, but at least they were balanced off the same white card. Yeah not an ideal setup

I use the hd100 and hd200. Out of the box they dont have "punch" or "whomp" in their colors but after modifying their colors, and i strongly suggest you do, they both shine and are great cameras.

I recommend Paolo's truecolor v3 for the hd100 and tim's DSC or superwide settings for the hd200. (see the sticky above)

Both of them have different DSPs so they have different color adjustment "personalities".

I too find the 200 "dull" out of the box but I've gone a different route: I've modified one of Tim Dashwood's Wide Latitude settings for my own preferences and colour correct in post to get more dynamic range.

Oh, and my opinion is that out of the box, the JVC is cold-neutral in it's white balance from a true white source.