I was exclusively in southern Brazil, Rio Grande do Sul and Santa Catarina.
It is safer but it is "safer by Brazilian standards."
A murder rate of 25 or 32 per 100,000 in a city in southern Brazil is considered "safe" or "safer" compared with the Northeast where a murder rate might be 60 per 100,000 for a similarly sized city, although both murder rates are ridiculous by American standards. A murder rate of 25 per 100,000 or 32 per 100,000 for an American city in the Midwest or Southwest would make it a city in the top 10 for most dangerous cities in the USA.
And how real these murder rates in LatAm are? Where I'm from (before I moved to the States) - murder rates are completely fake country-wide (and this is even admitted in official government documents). US murder rates are at least close to accurate.
I lived in one of these 20-ish murder rate cities in the States long time ago, right on the edge of 'bad area" too, and had not experienced ever feeling unsafe and didn't even lock my windows or doors. I don't think this can be remotely compared to what's going on in Latin America.