I don't think the Raiders will expose Jordy to more than the usual amount of time in their third preseason game to be honest. I think he's going to have a 60+ season with 1,000 yards, and up to 10 TDs when it's over. He might be below Adams in his totals, but possibly higher in TDs. I also predict his yards per catch will be as high, if not higher than Adams.
The difference in numbers will be based on number of targets, and I believe their percentage caught will be quite similar.