Not necessarilly.
The biggest thing with the Jammers is that they are discontinued and they're limited to what folks have in stock.
If you ever needed a single injector or nozzle replaced, you'd be kind of screwed.
Where as with the DDP's, all you need to do is call them up and say, "Hey, I need a 37 LPH nozzle...." and Lenny tunrs around, puts it in the honing machine and you get a new nozzle.