As mentioned, now that you're confirmed on OS in J, you can waitlist for the nonstop flight on CO at the standard reward level.

FWIW, I had been looking into the OS routing for my partner (cheapest *A paid J fare at the time), and I think the VIE layover was a bit long, and supposedly the business class lounge only had one shower. But my research was consistent with what people are saying here about the OS product.