When comparing Kompare vs BBEdit, the Slant community recommends BBEdit for most people. In the question“What are the best folder/file compare/diff tools for either OSX, Linux or Windows?” BBEdit is ranked 7th while Kompare is ranked 19th. The most important reason people chose BBEdit is:
BBEdit is commercial software, the paid counterpart to their free application Textwrangler. Though BBEdit comes off as pricey, this allows for stable and consistent updates from the developers. BBEdit has been around since 1992.
Specs
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Pros
Pro Can create patch files
Kompare can create a patch file which lists the differences between two files. Patch files created this way are also compatible with the patch files created by the CLI diff utility.
Pro Supports comparing directories
Kompare can compare both files and directories.
Pro Configurable hotkeys
Because it's a KDE app, all the hotkeys are configurable
Pro Stable development, been around for decades
BBEdit is commercial software, the paid counterpart to their free application Textwrangler. Though BBEdit comes off as pricey, this allows for stable and consistent updates from the developers. BBEdit has been around since 1992.
Pro Can open very large files
Pro Just about every feature is already built in
No searching for plug-ins that may or may not work.
Pro Great customer support
The developer is very responsive to bug reports and feature suggestions.
Pro Native application
Follows platform standards.
Pro Built-in FTP/SFTP browser
BBEdit can open files directly from, and save them to, any available FTP server. It can also open and save files directly via SFTP (SSH File Transfer Protocol).
Pro Great JAMStack environment
You can build the static site of your dreams without needing any external assistants. Although it does not process LESS, SASS, or SCSS files, BBEdit's includes are very powerful.
Cons
Con Featureless
Con Expensive
It's US$49.99 a single user license.