When comparing Sumo Paint vs GraphicsGale, the Slant community recommends GraphicsGale for most people. In the question“What are the best pixel art / sprite editors?” GraphicsGale is ranked 5th while Sumo Paint is ranked 40th. The most important reason people chose GraphicsGale is:
The animation tools in GraphicsGale are very easy to work with. Furthermore, the live preview helps clean up the animations in real time without a hitch.
Specs
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Pros
Pro Has most of standard Photoshop filters
Pro Has a Chrome App
Chrome app can be downloaded here.
Pro Has advanced layers support
Pro Can save to cloud, locally, or directly copy to clipboard
Pro Powerful animation tools
The animation tools in GraphicsGale are very easy to work with. Furthermore, the live preview helps clean up the animations in real time without a hitch.
Pro Offers a great palette tool
With GraphicsGale, the user can save and load palette, create gradation, and make color uniform.
Pro Free
Graphics Gale used to cost money but recently the program switched over to a free license.
Pro Pretty easy to learn the UI and the tools you have to work with are fantastic
Pro Works really well under Wine
Wine can help emulate Windows on non-Windows systems. You can get Graphics Gale running anywhere Wine can run. See WineHQ for more details.
Cons
Con Requires Flash
Con Slow to open
Sumo Paint is pretty slow to open when compared to other online photo editors.
Con Lacks drag and drop support
Doesn't yet support dragging & droping images in to the browser window.
Con Cannot zoom using mouse wheel
Con Only available on Windows
GraphicsGale is only available on Windows.
Con UI requires a lot of clicking
The UI windows not very nice and requires a lot of clicking. For example mouse wheel is not useable at all to zoom in and out in main window.