I think the price difference is a little less...doesn't the Blichmann come with two cords and plug and receptacle? You'd have to add that stuff to the Stilldragon, wouldn't you?
https://www.blichmannengineering.com/power-controller.html
And as long as we're headed in this direction

, I'll point out the Auber Instruments panel (which you already know I did). It's DIY, in that you have to assemble it yourself, need to have some wire and terminals added, but it ends up being in the area of $400 when all is said and done. Assembly by Auber is about $200.
I did it myself (with a little bit of help

, but I'm still very happy with it.
https://www.auberins.com/index.php?main_page=product_info&cPath=64_66&products_id=809
View attachment 610055