Are you referring to Lightroom's masking capability? Indeed, even in Photoshop it is possible to select a color and perform a masked adjustment. Lightroom's selection/masking tools are pretty good and for basic tasks it is fine, but the masking workflow is (IMHO) fundamentally limited. DaVinci's nodes can be stacked on top of each other and the per-hue adjustments are live. Also... I gotta say that the visualization the DV's tools offer is far superior. At a glance I can see the range of hue that have been selected as well as the degree of change they are being subject to.
FYI, In DV it is possible to edit hue to hue, hue to saturation, hue to luminesce, luminesce to saturation, saturation to saturation and saturation to luminesce. There is also the amazing chroma warp, using which near arbitrary color adjustments can be made. Nothing out there comes even close to that capability. No wonder most Hollywood movies are color graded in DV.
Stacked you mean each node works on the input from another nodes output? So I could add a node to make green blue and another node to make blue green again? Because Lightroom mask only work on the base adjustment. Sounds good if I got this right. I wanted to play around with it anyways.
Yes, it would work like that. Moreover, the adjustments concatenate. In other word if a node darkens an image to the point of blackness, the following node can restore the original brightness.
That being said, the new photo editing functionality of DaVinci is not the smoothest. The DaVinci app is a bit of a Frankenstein. The editor is a development laid on top of the original DaVinci color app. The audio page (Fairlight) and the VFX module (Fusion) were purchases which were acquired and 'glued on'. Moving from one to the other can be clunky - though not as bad an experience as Adobe's dynamic links.