Arial vs Helvetica. Test yourself: can you really tell which is which?

I know the difference is quite subtle, but that’s how Arial was meant to be. At least, this is the most common opinion.
Other experts think it’s just “like criticising a daughter just because she looks like her mother.”

Personally, I think Arial has its own reasons to exist. One of these is to make Helvetica look better.

Anyway, I ended up proudly with a score of 19/20 from this test, I’ve been pwned just by MATTEL all-caps rotated logo.

Anybody any better?
Thanks to Tina (swiss-miss) for spotting this great test.