GIF vs APNG vs WebP

Test 1

Test 2

Test 3

Test 4

Test 5

SteamEngine.gif
SteamEngine.png
GIF = 43 920 bytes
APNG = 34 210 bytes
SteamEngine.webp
SteamEngine_lossy.webp
WebP = 41 064 bytes
Lossy WebP = 73 774 bytes
Original GIF is from http://www.buzzhunt.co.uk/2009/06/12/simple-mechanisms-explained/

Used gif2apng and gif2webp tools to convert it into APNG and WebP.