projector upgrade?

Has anyone upgraded projector from JVC RS-1 to
new JVC RS-20U? Big improvement or lateral move?
A certain improvement but not a big improvement overall. The RS-1 had colors that were just too oversaturared. The Color Management System in the RS20 works well. It produces some of the most natural colors that I have seen. I my RS20 and it was a worthwhile upgrade. It however doe not blow away the RS-1.
I think Bulldogger has it right here. I'd ad that black level is a tick better on the rs20. Other than that....
Thanks Bulldogger and Queefee.