Originally Posted by st1575

They might be the same for BA flights, but not always for other carriers.

Taking the example of my CX redemption for early January 2015, the BA engine wasn't showing the same HKG-EWR (the new flight) J availability as the JL engine at one point, along the lines of 2 vs. 3. I re-verified using the CX engine, which seemed to confirmed JL's number. The HKG-JFK numbers were the same.