[eddyg]

One difference I noticed:

Shortcat: “Shortcat leverages the Accessibility API used in macOS, used by VoiceOver and other screen readers, to be able to expose UI elements, menus, apps, and windows as a list for you to search through and action.”

Superkey: “[The] Seek [feature] uses Optical Character Recognition (OCR) to find your text, and there are currently some limitations to this. It has a particularly difficult time with certain shades of blue text on black background, small text, and text close to lines.”