@Robson My recommendation, if you already have some ZMF cables that you like, would be to buy a Utopia-mini XLR adapter. I use those on my Utopia 2022.
Even if you still want to buy another cable, trying your OG with both a copper and silver Lektrik will help you decide what you want to get. And any new cable you buy could be terminated in mini-XLR, making it usable for your Utopia and ZMF headphones, so the adapter wouldn’t be a waste of money.
If you do pursue a new cable, then Corpse uses Cardas copper for their Gravedigger so I’m going to guess that the closest from the other boutiques is something made from OCC copper, or mostly OCC copper with a little silver mixed in, if you’re looking for a similar tone. I have a friend who uses a silver DHC Molecule Elite with his Utopia OG because it doesn’t add anything to the sound, but it doesn’t sound like that’s the direction you want to take.
I have an Arctic Cuprum (OCC copper), Gladius (half OCC copper, half OCC copper/silver blend) and Euphoria (lots and lots OCC silver).
The Cuprum was my first foray into premium cables, and I use it with my Stellia. It has a really nice tone IMO.
I’ve compared the Gladius to multiple other cables and it definitely sits in the “sounds like a copper cable” group, as the mids are nice and warm, but the treble is also extended without being bright, and I’m guessing that comes from the copper/silver blend. The Vector that you mentioned sounds like a “baby Gladius”.
The Euphora sounds very different from my DHC Molecule Elite (very neutral, neither warm nor bright) and closer to my memory of the Prion4 (still fairly neutral but the extra silver seems to give more body to the mids, without quite tilting the sound to warm).
Arctic doesn’t have sales IMO, which I think is smart for a boutique manufacturer, because it gives them steady cashflow throughout the year, instead of a rush of orders at sale time. I also have cables from Norne and DHC, and I think they’re all comparable in terms of quality, but the customer service at Arctic is second to none. If you email them with what you’re looking for, they’ll quickly respond with suggestions within your budget. They have a bunch of headphones that they test with, and have always been open with me about how a cable sounds with a particular pair of headphones.
Edit: I forgot to say that I’ll try to remember to bring my adapters and various cables to CAF in a couple of weeks, and I’m hoping to try the cables with an OG while I’m there.