I can tell you didn't even bother to visit either link as stated. And they even have an example where the apng is 20 percent smaller.
As a matter of fact, compared to gifs, webp & apng typically get a much lower file size with not much loss in visuals.
Quote:
gif2apng is a simple program that converts animations from GIF to APNG format.
It disproves the common misconception that Animated PNG files are always too big, as it actually creates APNG files smaller than the original GIFs. Command-line version is very easy to use, and available for all major OSes. GUI version for Windows is also available.