The trees trunks definitely look the most natural under that 519A 4500k vs the 219B SW45K.
What makes SST20 so nice is that it has such higher throw and lumen output, that you can afford to put a minus green filter in front of it, sacrifice some of the output, but still come out at or above 519A output.
Btw, lavenders are not supposed to be naturally rendered strongly from CCTs at only 4000 to 4500k. Those lower CCTs have less purple and blue content in their spectral balance. It’s why 100 CRI 2700k incandescents do a terrible job at distinguishing purples from blacks. The SW45K is only emphasizing the lavender plant because it’s emphasizing magenta hues in it, at the expense of making the tree trunks and rocks look magenta as well.
If you want the absolute best color rendering and separation, you’d get something with a very neutral duv, but at a CCT that has very good spectral balance, closer to 5000k or 5500k.