Superwash LOOOVES Dye!
Totally forgot to post comparison pictures when I dyed this about a month ago, but here's an example of how different yarns take dye differently!
This is the EXACT SAME DYELOT, first normal merino single-ply, second superwash sock wool:
This is the EXACT SAME DYELOT, first normal merino single-ply, second superwash sock wool: