When comparing DiffView vs sublimious, the Slant community recommends sublimious for most people. In the question“What are the best plugins for Sublime Text?” sublimious is ranked 30th while DiffView is ranked 42nd. The most important reason people chose sublimious is:
Whenever you need to work on a new language that you don't have plugins for yet, you can choose to check if sublimious has a layer for that language. If it does, all you need to do is activate it and sublimious will automatically download all plugins you need for that language, add keybindings for efficient usage and set the optimal settings for these plugins.
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Pros
Pro Flexible diffs for Git, SVN and Bazaar
Pro Auto-detects the repository to use from the current active file
Pro Quick navigation from one change to the next, or search for diffs in a specific file
Pro Side-by-side view with differences highlighted
Pro Pre-configured with layers
Whenever you need to work on a new language that you don't have plugins for yet, you can choose to check if sublimious has a layer for that language. If it does, all you need to do is activate it and sublimious will automatically download all plugins you need for that language, add keybindings for efficient usage and set the optimal settings for these plugins.
Pro VIM centric
This plugin is perfect for VIM fanatics. It tries to add VIM keybindings to everything, even to where you didn't know it was possible like the sublime text overlay or the sidebar
Pro Ergonomic shortcuts
sublimious adds shortcuts that actually make sense. "p f" for example searches files in the current project. "g s" executes "git status" and so on, you get the idea. It even comes with a helper that shows you what shortcuts are available.