The only way to reliably compare output is to run the same exact feedstock in both systems multiple times, under 'standard operating conditions', analyze the results (that may be a whole nuther can of worms), and do a statistical analysis. That is obviously never going to happen. I don't even think about comparing the two except that they both accept plastic feedstock. Agilyx made it to the trough first, we have to see what transpires now that JBI is making such amazing progress. Somebody is obviously paying attention.
Keep in mind that JBI is only processing LDPE, HDPE, and PP at this time but may be able to expand to other polyolefin feedstocks in the future. To make the quality fuel that JBI produces, they have to limit the feedstock to the range of polymer chemistries that will result in that output. I believe that they will be expand to other types of plastic but the 'low hanging fruit' for JBI is the polyolefins...and there is plenty of it available.