When comparing Powerlevel10k vs robbyrussell, the Slant community recommends Powerlevel10k for most people. In the question“What's the best theme for Oh My Zsh?” Powerlevel10k is ranked 1st while robbyrussell is ranked 8th. The most important reason people chose Powerlevel10k is:
Feels as fast as Bash.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Probably the fastest ZSH theme
Feels as fast as Bash.
Pro Works great out of the box
Functional and fast prompt without having to twiddle with configuration options.
Pro The built-in interactive configuration wizard makes it easy to get started.
Type p10k configure
to run the configuration wizard.
Pro Uses the same configuration as Powerlevel9k and produces identical prompt but much faster
Trivial to switch over.
Pro Flexible
You can make it look like any other theme by changing configuration option.
Pro Works well with all fonts
Powerlevel10k doesn't require custom fonts but can take advantage of them if they are available. It works well with Nerd Fonts, Source Code Pro, Font Awesome, Powerline, and even the default system fonts.
Pro Loads quickly
Prompt appears almost immediately after opening zsh.
Pro The default theme for oh my zsh
You don't need to change anything to use this. It's the default theme.
Pro Very simple
Shows the folder you are in and if there's a git repository it shows the current branch.
Pro Nice color
Nice color codes.
Cons
Con Not installed by default
Have to go to the project page and git clone the theme.
Con Does not show your current directory
Plain PROMPT='%~ '
has a big advantage over this theme.
Con Slow when working with large Git repositories
Con Prompt screws up cursor
The right arrow used in the prompt seems to be larger than 1 character, but slightly smaller than two. As such, your cursor will either be very slightly offset, or so offset that it is unworkable.