If same price just go for superflower 80 plus gold.

Any superflower PSU is good to go. They are few of the top PSU maker.
As for corsair they source their supplier everywhere so if I were you I would not pay for that extra cost.

Not sure about that but most of superflower PSU are real 80 plus certified, while many other might just claim instead of 80 plus certified. Hence, it still safer buy without looking into internal parts.

Not sure who made the CM WME for cooler master so can't comment without looking into the internal parts.

The superflower leadex III bronze should be old certification which is based on 110V. The new certification will state 230V EU if it is based on 230V. The leadex III bronze should just as good as the new leadex III silver for the price range.

Of course the more expensive is always better if budget allow. Btw, most PSU efficiency works best between 40 to 80 utilisation. So sometimes is better to get lower wattage if you don't plan for power hunger build.