I've got a number 18 model if that's what you're talking about, but there is also a smaller one called the number 12.
I've abused my number 18 and now it's got quite a bit of play, but it's no different from a Laplander I've abused in the same way. I'd say performance is on par with the Laplander no better, no worse. But the opinel is more expensive, for that you seem to get a wood handle and satin finish blade made from 12c27 I believe. Both saws have replaceable blades and lock open (the opinel doesn't lock closed).