It’s hard to say which is better, MIPS or not… you can’t go back and repeat binning it with the other helmet on and see how it went. But a few years ago, I had a good go at it, and completely demolished a non MIPS Specialized lid, fracturing my skull, and few other sundry bits and bobs at the same time.
I wear a Bontrager Rally MIPS now, and I’m pretty sure it’s a much better helmet than what I was wearing, and I’m guessing it and its MIPS, would have done a better job of saving my scone. It may have just moved more impact to other parts of my body, as at the time, the most severe pain was from my neck, and I thought I had broken it, but who can say what goes down, when it goes randomly pear shaped.
Anyway, I love my MIPS helmet and every lid from now on will be MIPS.