Doing a visual comparison (tab flipping between https://fonts.google.com/noto/specimen/Noto+Sans https://fonts.google.com/noto/specimen/Noto+Sans and https://

Doing a visual comparison (tab flipping between https://fonts.google.com/noto/specimen/Noto+Sans https://fonts.google.com/noto/specimen/Noto+Sans and https://fonts.google.com/specimen/Open+Sans?query=open+sans&preview.text=Whereas%20recognition%20of%20the%20inherent%20dignity&preview.text_type=custom https://fonts.google.com/specimen/Open+Sans?query=open+sans&... , aligning the sample text exactly), I could notice some differences though: - The 'g' character was changed, they are quite different - For the regular (400) weight, Noto Sans is slightly bolder but also more compact But you're definitely right, most character shapes look directly inherited from one to the other. I wonder if the weight & letter spacing change can explain the reading speed differences, or if measurement error / random jitter is actually what explains the different average speed in the study between the two.