Not different. Same people. The population of Jeollado is quite lower than other province, but the place where people live is the same. If you've heard anything bad, it's a false rumor, so don't worry. There are some people who despised people of Jeolla province for political reasons.
The spoken language in jeolla is weird, also there is some victim mentality which doesn't make sense. the reason why I know this characteristic, they usually show their opinion straightly even though it's related with issue with controversial. Sometime, I struggle to talking with them because, I don't like to talk about politic and recent issue and reveal my personal opinion. also there is a lot of politic issue which trigger them. they are too much sensitive!
Still, I focused on individual personality than their regional background but it's mostly a different thing between major cities people and jeolla people.