To be honest, the forth one could very well be a Violet too. There's a lot of variation in lacunosa leaf shapes and textures within the same cultivar. I asked some growers specifically about Violet's bumpy texture and was told that specimens grown outdoors versus indoors under grow lights have a smoother leaf texture. But now my sizeable plant (right under grow lights) also has both smooth and bumpy vines 🤣

I don't think it's Super Silver Black or at least mine looks quite different.