It looks like the tool creates 8 bit .gif files rather than h264 encoded webm videos. Is there any demand for actual .gif files these days?
https://blog.flixel.com/what-is-a-cinemagraph-how-do-they-wo...
True, ‘kids these days’ are oblivious that most GIF hosts don’t host GIFs.
H264 (H.264/AVC/MPEG-4 Part 10) is a video compression encoding often paired with AAC audio, often e-delivered inside an .mp4 or .mv4 file container.
Imgur’s GIFV file popularized on reddit is a renamed .mp4:
https://www.filedesc.com/en/file/gifv
Note WebM is an MKV-like container for VP8 video encoding w/ Vorbis audio. You would have to convert (transcode) the video and audio to go between MPEG-4 and WebM.
https://www.webmproject.org/docs/container/
Just for fun, GIFs can contain more than 256 colors:
https://en.wikipedia.org/wiki/GIF#/media/File:SmallFullColou...
Considering most sites that let users upload gifs convert them into looping soundless videos, I'd say they're "very different" insofar as they're very inferior.