I wish I had looked up “lightify strips” before writing all of this because comparing those to an RGBW Dimmer is like comparing apples to puppies…
First off they’re zigbee which is far superior protocol for color control. Second it has a built-in controller so it knows all the specs of the LED strip it’s attached to and can manipulate it based on the commands it receives from the hub. Now I get why you kept thinking there was a smart/mixing aspect of the RGBW Dimmer…
The Zooz RGBW Dimmer is meant to be used with a dumb LED Strip, which you can often find for less than $20 on Amazon, and the color sends output to each channel and that color turns on. The RGBW Dimmer has no knowledge of what it’s attached to, it just sends electricity to each color wire.
Everything below still applies, but it probably isn’t necessary now that I realized you’re expectation of how it should work is based off something completely different, but since I already wrote it I’m going to leave it in the post.
That warm white example looks like a somewhat cool white LED next to a red LED and your cool white example has the same cool white LED with a blue LED next to it.
That’s not changing the color temperature of the white LED and the only reason that partially works with your LED strip is because your LEDs appear to be split RGB and White which are practically touching each other. A lot of LED strips have dedicated White LEDs and RGB LEDs which alternate and have gaps between them so that wouldn’t work at all with those.
Except for those built-in automations, the Zooz RGBW Dimmer doesn’t do any calculations, it just allows you to explicitly set the 0-255 value of the warm white (0), red (1), green (2), and blue (3) color component ids.
For example, if a Smart App passes purple into the setColor command then the DTH has to convert purple into a 0-255 value for R, G, and B. It then sends a command to the device that sets color component ids 2, 3, and 4 to their corresponding values and the device uses those levels to change the RGB LED to purple.
Most of the RGBW bulbs I’ve worked with allow you to use the ratio of the warm white color component id (0) and the cold white color component id (1) to determine the white color temperature.
If a SmartApp passes 6000 into the setColorTemperature command and the level is at 100%, then the DTH sets id 0 to 0 and id 1 to 255. 2700 sets id 0 to 255 and id 1 to 0. 4500 sets id 0 to 140 and id 1 to 115.
The RGBW Dimmer doesn’t support the cold white color component id (1) so there’s no way to change the actual color temperature of the white channel. Based on all the RGBW LED Strips I’ve seen either being warm white or cold white and not specifying a temperature range, I believe they have a fixed color temperature and work as expected with the RGBW Dimmer.
Long story short, the white color depends entirely on led strip and the only time that might make a difference is when using the mode that has lighting because I think the lightening flashing is the only time the white channel is used in those modes.
I could simulate that behavior by including a setting for the white temperature of their LED Strip and then calculating the amount of red or blue to include based on their strips default color temperature and expected color temperature, but it wouldn’t work at all for dedicated RGB and White LEDs and it messes up the ability to use White and RGB together so you wouldn’t be able to display bright green and a specific color temperature at the same time.