One is a fork of Bitcoin and SV is a fork of Bitcoin cash. Bitcoin cash and Bitcoin SV are run by prior developers who split form Bitcoin core and now wanted to make money for themselves in a more greedy way by developing these other two coins, purely to try to oust Bitcoin from the top position, steal the miners and make a ton of money. They say it's in the good spirit of innovation but we know otherwise. First Bitcoin cash tried to bring the price of Bitcoin down with some Korean business and pump groups and then Bitcoin SV tried to hijack the whole CMC by Craig Wright bullying miners into submission to mine his coin at launch or he would dump his Bitcoin, which he did and caused this nice crash we have today.