What's the difference between XEDE, AEM EMS, Dynoflash, ect... Do they all do the same thing? Is one better over another or is it just personal prefferance? Can anyone reccomend one over another? Sorry for the newbie question.

 

xede/utec=piggy back. AEM EMS=stand alone, Dynoflash=Reflash.

EMS is the best but needs tons of tuning.

Reflash is good if you are finished modding your car and dont want to deal with tuning.

Xede/Utec are great, have the some of the functions as the EMS, but with out the headaches. but on the other hand doesnt have a few good functions of the EMS, aka speed density