Just wondering if you possibly also had the old motors on your first one. I love the speed that I get with my P3A but like Frank, I run older firmware to keep it fast. 1.3.002. Then my P3P came with 1.6.4 firmware and there is a speed and handling difference. The P3P isn't really much slower but its acceleration speed is a lot slower. In other words, it takes longer to get up to speed and this may be what you are seeing also. It still goes plenty fast... It just takes longer to get up to full speed. The good thing is that all my batteries have the 1.6.4 update run fine on my P3A with the 1.3.002 fw. I'm pretty sure that the acceleration difference is simply in the firmware because both of my rc's are the B series.