It really depends on what you want from it. The tune and power increase will be the same with the livewire, but you will be able to monitor some rather important live data with the livewire.. Hence the name. If you run boost or nitrous
, I reccommend the livewire so you can monitor air/fuel ratios and make sure your tune is accurate and effective. If you won't put those features to use, just get the bump in power by buying the handheld.