In terms of difficulty level, the primary difference I see is that the paint job on the ROTJ jet pack is much harder than the ESB, while the ESB has a Pulce 40 and Nemrod holster. From a cost perspective, this makes ESB more expensive if you add a sidearm. I didn't think that painting the Pulce was that difficult. The amount of effort is very similar. I would make your decision about which costume you prefer.