Solder

OK, sorry, I am sure like car forums discussing engine oil, solder has been discussed before. But I would appreciate advice from people who have tried some of the more expensive solders available. I buy parts from Farnell which have several solders with Silver content, but also from HIFi Collective in the UK, which has this lovely selection to choose from: https://www.hificollective.co.uk/components/solder.html

Currently I'm using Oyaide 4.7% silver, simply because it's a good, clean mid-priced solder from a reputable source, with what seems a good specification.

I'm wondering if it's worth using 9.5% silver Mundorf solder, because silver is considerably more conductive than tin ? Has anybody tried these and compared to a more basic solder ? Is there any difference in sound quality.... OK, as I typed that a little part of me did wonder if that's even a sensible question... but I'm interested in other people's experience. I'm not advocating for costly solders, I've no experience of them, hence asking.