From 1st hand experience I can confirm that the haltech is far superior to the emanage ultimate (EMU). I had the same tuner, Greg (Pro-tuner) who dynotuned my EMU and Haltech so I can rule out one of the major factors of tuning an ecu , i.e. the tuner.
The emanage ultimate was okay (not great), conversely the haltech is much better in every respect. Haltech's 32 x32 mapping versus EMU's 16 x 16 translates to a more accomplished tune.
Looking at the a/f meter the car is not running as rich. The car responses well throughout the RPM range. Idles well etc..
So buying an ecu has been a definite case for me ‘you get what you pay for’. Find out who can tune your car before you buy an ecu, as the tuner plays an pivotal part of the process.