I have ran both and Cellucor NO3 trounces Yok3d. NO3 is far better and has a much higher quality ingredient profile than Yok3d. I could never acheive an actual "pump" with Yok3d but NO3 always gave me a nice, strong pump. NO3 is so good that you really can't find it at a significant discount anywhere, even Ebay prices are still pretty high.