Who takes more risk as an artist Beyonce or Rihanna?

Beyonce.
Can think of one risk Rihanna has taken (and no ANTI was not risky)

Albums wise it's always been Beyonce up until this year, as I feel that ANTI succeeded Lemonade in terms of risks. Aside from Needed Me the album is anti-mainstream, and while a large part of Lemoade is too, it has Sorry, 6 Inch Heels, Hold Up, All Night and to an extent Freedom which are all a lot more commercially friendly than any of ANTI's songs.

Beyoncé Changing hair colour each era is not a risk

Beyonce.Is Rihanna even a "risk taker"?

Both are amazing, but Beyoncé is a bigger risk taker

I don't think any of them take any risks, and that' not a criticism