I have, and am using, an Etrac, and have owned and used a T2. I even had the 12x15 coil for my T2.
My opinion both of them (COMPARED to eachother):
T2 is lightning quick response and I could cover a lot of ground quick. The ID, depth, and discrim were great. T2 is very light too.
Etrac is awesome in iron and garbage. 100X more customizable for areas compared to the T2's notch. The two 2-digit TID readouts are amazing.
....I love my Etrac since I figured it out. I actually passed a CTX by this year to go by 'what works!'
I always dig iffy signals, things on end.... bad soil... coins stuck togetehr can throw ANY detector a iffy signal...
BUT!.....
but when I hit the regular good (clad, old US coins, rings, etc) they are SPOT-ON to the effect that I'd bet you lunch that I am gonna dig what I am gonna say I am gonna dig....and when the signals are bad (tabs, caps, foil, canslaw, etc) they are SPOT-ON to the effect that I'd bet you lunch that it's junk...
Both detectors are amazing! but if you take a few months and learn the ETrac... you will go back to it for proven reliability....
jsut my opinion...