In summarizing the difference in gamma controls the JVC has four pre-defined settings compared to the Sharp’s five, but you can do all kind of tweaking, tuning, adjustments (whatever you call it), beyond the five presets, on the Sharp. The JVC gives you the four, and that’s it, no way to modify them.
As I talk about the color management system of the Sharp, to tie everything together, I’ll also talk about the kind of adjustments needed to these to projectors, based on the measurements taken.
Once again, the Sharp offers far more image control when it comes to color, in fact it offers magnitudes more control. The CMS (color management system) of the Sharp is extensive, supporting not just RGB control, but also offers secondary color controls (cyan, yellow, magenta).
With the Sharp (you access the CMS system from the Picture menu, by selecting Advanced) there is separate control for Hue, Saturation, and what Sharp calls Value (not even defined in their manual). With the Hue control, you can control the balance of an individual color, for example – find that pure reds seem to have a slightly orangish caste to them. Bingo, adjust that here, to correct.
By comparison, the JVC has almost no control at all. In fact what they do offer, beyond its basic presets (Cinema, Natural, Dynamic, plus 3 savable settings), is just Color Offset, on the Image menu. This allows you to adjust Red, Green, and Blue, separately. That’s it! Now the good news is that the JVC RS1 offers the best out of the box color for movie watching I’ve seen yet (and that includes two far more expensive 3 chip DLP 720p projectors, the InFocus 777 and the SIM2 C3X).
xzv20000 menu Picture mode
JVC RS-1 menu setup imageprofile
xzv20000 menu picture CMS
Sharp XV-Z20000 and JVC RS1 User Memory Settings
Sharp has the Memory setting option for Picture mode, and also for gamma, etc. As a result you can just modify existing settings, or save a new one, as needed. Best I can tell, you are limited to just one new preset. but the manual is almost worthless. There is no mention if the projector will recognize different sources, so that a different group of settings can be saved for each device, or failing that, for each input. I must apologize, as I didn't explore this further. I will try to update!
The JVC by comparison has 3 User Savable Memory settings (found in the Setup mode, along side the three preset modes (as shown in the JVC's Setup Menu above.