there are some slight differences. my colleague next door has a curved 34"
dell ultrawide. I compared with mine, and noticed that it does require less
head movement to read, but I just don't like the curved lines - I like to
see straight lines as straight.
From the reviews I've read, curved screens are good for watching movies, but
not necessarily better for heavy text editing or graphics design works.
in any case, I really like the color of my LG, very comfortable to read.
by the way, for ultrawide screens, you can use Win+left/right/top/bottom
arrow keys to quickly split screens, even you use Linux (like me).