Would silver cables beat UP-OCC copper?

Having use both types in my system I chose solid core silver cables. subjective of course and opinions will vary among listeners. When high quality silver is implemented properly it sounds organic and beautiful. I find It has natural warmth, tonal body/harmonics yet is also very resolved and transparent. I haven't experienced the brightness,edge or glare that some attribute to silver. It is honest with a natural character.All silver cables aren't created equal, some are better executed than others(like any other product).

I use 7N UP-OCC Silver interconnects for both phono and and line level
connections. I found it a significant upgrade over the same copper based
cable.

I use a small Canadian boutique manufacture who has an inside personal
connection with the manufacturing company that holds the OCC patent that
supplies cables to the "Big Boys".

Check out the price and then compare the cost to other manufactures that
use the same cable material.

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per given unit there will be one that does and one that doesn't.

They the silver cables might come in handy. When the moon turns full and the wolfs bane is in bloom.

As stated already all silver and copper interconnects are not created equally.
On top of that it's all dependent upon your equipment and your listening preferences. Until you hear it for yourself in your own system you will never really know which one you prefer.