I actually tried those! I tried them because I used to buy Daddario 10-46 And swap out the 46 for a 52, but then I discovered the KFK pack already comes with an extra 52 for that exact reason; if you want to drop-tune.
They were so bad that I complained to the supplier, who refunded me AND sent me out another pack to try, which were in even worse condition than the first ones.
They had some weird black marks on the plain strings, like they'd been burnt or something, and they just felt fucking awful under the fingers. Worst strings ever.
And no those weren't the only Dunlops I've tried. They all suck. But those were the worst.