Nordost Valhalla vs. SR Atmosphere Euphoria speaker cables

I really need advice on upgrading acoustic cables.
I'm thinking about exchanging Nordost Valhalla & Synergistic Research Galileo Cells cable for SR Atmosphere X Euphoria Level 3 Speaker Cable. Will I get an improvement?
Or go with a SR SX?
I will be grateful for any experience, but only related to these brands.
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Showing 1 response by speedbump6

I’m confused. The atmosphere is a step down from the Galileo. Unsure as to why that should be an improvement