What is the difference between the ShortPixel Image Optimizer and Autoptimize with Image Optimization & CDN by ShortPixel

The ShortPixel Image Optimizer is an image optimization plugin that replaces the local files with their optimized versions. Once the images are optimized, they remain optimized even if you choose to deactivate the plugin.

On the other hand, the Autoptimize plugin with the Image Optimization function active will not touch the local files. Instead it will optimize on-the-fly and serve the images from the ShortPixel CDN. Deactivating the "Image Optimization" option in Autoptimize or deactivating the Autoptimize plugin altogether, means that the website will start serving the old, un-optimized images immediately.
Here is a list of benefits in using Autoptimize with ShortPixel Image Optimization & CDN.

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