VRMX1 vs. DZMX1 Leviton Dimmers

These two products look nearly identical but I think I read the DZ doesn’t support Instant status whereas the VR does.

I thought I read it was a patent issue where the instant status of the VR required a royalty to Lutron hence higher cost and higher price.

[ol][li]Is the instant status the only difference?[/li]
[li]Is the Lutron story true, sounds a bit odd that the ZWave body didn’t require vendors contribute IPR on a royalty free basis in return for their own licence[/li][/ol]

I like the instant status but it looks like a $20-30 cost adder, must be some hefty royalty fee.