I got 66%, I feel sad now :(.
Yeah. Every GUI text is either single characters or two or three letter abbreviations. Neither words nor paragraphs are common. That's how people look at typefaces.
83%! Many of the characters are similar, but I find that sentences and paragraphs appear quite distinct. Especially at the small sizes San Francisco is intended for.
75%. Was surprised how similar they are!
100%, the fonts are quite similar, but if you look at Helvetica Neue, the edges are much sharper
Failed one. I don't know which one. It's very easy!
Wow, interesting. Surprised at how similar they are. 83% for the interested :V
83%, that was tough near the end.
83%, this is amazingly hard!
91%, the last were very challenging.
93% Had some trouble with the last ones.