2 Elites are travelling YYZ-YVR on a Wednesday morning 3 weeks form now. According to Expertflyer.com AC131 is I9 with only 4 J seats currently occupied (Expertflyer is not showing J Inventory numbers, apparently due to a dispute between AC and Sabre). AC105 is showing I9 with 6/20 J seats occupied. Which offers a greater likelhood of getting an upgrade when their upgrade window opens?

Similarly, coming back on Friday am, AC142 is I9 and wide open in J, as is AC116.

Thanks for the advice.