I also have both. The Bell 412 is top notch as avgaskoolaid said. Buying the AW139 would be a mistake. It is unusable as it stands, Almost nothing works and it no longer seems to be updated. Rotobrake dont work, autopilot is bugged,force trim dont work correctly, mfd displays only one page each, there is no modern navigation system implemented only VOR & ADF, the FMC only works for radio frequencies and absolutly not for planning and flying a route, the motor management system is buggy and so on. In fact it is a very beautiful 3D model but completely hollow. I wrote to the developper and the only answer i got was "when did you buy it" and after i answered... nothing.