Wywires Silver to Platinum interconnects. How big an upgrade would that be ?

I currently have Silver RCAs on my solid state phono stage. Impressive cable, so I am thinking of trying Platinum. Would be buying used. I also have Tchernov Reference MK II and Purist Neptune in my system. Wywires Silver and the Tchernov are similar, I would say the former has more elegance and the latter a little more power of delivery. Neptune is very different and works great everywhere in my system but best between preamp and amp.