That's absolutely not true, the Xbox failure rate was several times higher.
https://consumerist.com/2009/08/17/xbox-360-failure-rate-is-542-percent-game-informer-finds/
The PS3 was issue prone due to higher TDP, but I never experienced a failure in a PS3 outside a PSU after 5 years of use, no one I knew had one die
I had 11 Xbox 360s die, most within 30 days 3 different models. The latest 2 have lasted 4 years since. And I had maybe 2 people I knew that didn't have failures.
Not to say my rural area is a cross section of all production, but it's really naive to say they were about on par
After 2010/11 they are both rock solid probably equal.