SFT40 3000K vs 519A 4000K DD

I have noticed these sekonic graphs of two of my most used LED and CCT, SFT40 3000K and 519A 4000K DD. I find both of these graphs very similar. I thought the blue spike was higher on my 519A, but here it seems only 0.1 higher than the SFT40. I find this fascinating. Almost same CCT but very different tint but almost similar graph.