A lot of people have been asking for a clearer explanation of the Magnific Engines. Here you go (we'll also add this information to the website):
(Advanced)
• Illusio: better for illustrations, landscapes, and nature. Also good for the first pass of several upscales. Removes JPEG artifacts.
• Sharpy: better for realistic images like photographs. It provides the sharpest and most detailed images! However, it doesn't remove JPEG artifacts and can sometimes even create "fake JPEG artifacts".
• Sparkle: also good for realistic images. It's a middle ground between Illusio and Sharpy. Removes JPEG artifacts.
For multiple upscales, you can experiment: start, for example, with Illusio and finish with Sharpy to find the "sweet spot" for the style of your images.
If you have any questions, let me know!

This is Illusio, by the way. It feels like real drawings sometimes! But it's also good for landscapes and nature 😉