Inman Park is as far from downtown Atlanta as Murray Hill is from downtown Jacksonville, so it doesn't really belong in an article about downtown.
Also, a big picture thought- downtown Atlanta really is pretty distressed (though much less so than it once was)- lots of vagrants around Five Points, not much residential, in a city with much higher levels of crime than Jax (though differences in city limits may make this a dumb comparison).
One advantage downtown Jax has- downtown Atlanta has competitors that give you the high rise urbanism of downtown with a lower fear level- Midtown and Buckhead.