Those are quite different bikes. I think it's going to come down to what you prefer. You likely have a Bulls dealer in your area if you're buying it from someone locally. That might matter to you when it comes to maintenance and service of the bike. Juiced is online-only and as a second-hand owner you might not get much help from them, though I'm only guessing. You might also get some reluctance from your LBS to fix/work on the Juiced, versus just taking the Bulls to the local dealer/bike shop.
The other issues will be price, whether you prefer hub to mid drive, the feel of the bikes, and how you intend to use them. Bulls make great bikes, but there are also users here who have racked up thousands of commuter miles on Juiced bikes. Sort of depends on what you need the bike to do and what you expect (or don't) from the manufacturer and your local bike shop.