Both are gritty little cities with a bunch of interesting people living there doing interesting shit, all for next to nothing. You can rent a townhouse for under a thousand / month. Shit, you can BUY a gorgeous 19th century townhouse for under a 100k - the same thing that would be 3 million in the Brooklyn where Patti Smith and Robert Maplethorpe lived.
I'm not going to go on about how much there is to offer there, because I could do that for paragraphs. You should just go check it out for yourself.