So there it is, mystery solved.
Being my first o-ring chain ever I couldn't compare. Logical as it is I found it hard to merely accept that much difference between manufacturers.
Even when not as good as the competition, it does beat the stock non o-ring chain. 4000km plus, adjusted by just one notch of the camshells. Barenekd, I hope you're not thinking of safety issues?
Cheapo? I paid e49.50 which is 50% more than the non o-ring and I expect it to last way much longer. Will it outlast the pricier Regina I had in mind prior? Oh, choices...
So I went for o-ring
and holding on to the stock front sprocket, retaining the better torque.
Isn't it always a game of check and balances?