An easily changed option is not a big difference. From what I can tell, screen has better handling of colors. tmux seems to mess up the <Esc>[90m; -like seque

An easily changed option is not a big difference. From what I can tell, screen has better handling of colors. tmux seems to mess up the <Esc>[90m; -like sequence for colors 8-15. Also, I like the ability to highlight screen's current screen with colored parentheses.