My Experience is just the opposite as Elton as I have used all the differnt Explorers and now the E-Trac and find I dig less trash with the E-Trac and finding coins I had missed with the Explorers. With the Explorers I had to run in ferrous tones as I just got too many nails in conductivity that sounded so good. I also found if I wanted depth I could not run auto sensitivity either as manual did much better for me. Now with the E-Trac I tried to run it the same and wasnt happy at first, but I run the auto sensitivity +3 and conductivity tones and do great with it. I found I go by the tones first, then the conductivity numbers as they are more accurate then the Explorer, then look at the ferrous numbers and find targets that are less then 8 and higher than 24 are iron and those that may bounce between 10-16 are mostly coins depending on deep they are and if the tone and conductivity numbers are right. The reason the bounce is trash items close to the coins. The 1883 IH I got today sounded decent tones and changed a little while the conductivity numbers were 36-38 and the ferrous number were bouncing from 8-14 with most around 11-12. Dug down around 8-9 inches and pulled out the 1883 IH that has been missed many times before.
The E-Trac I feel runs smoother, a bit faster responding, better conductivity numbers as they seem more accurate and feel it is easier to use.
Another guy in my area has one and the SE Pro and didnt know what to think on the E-Trac when he first got it, but kept using it and found he was getting more coins in with nails than he did before and doing comparison on actual targets in the ground found the E-Trac for him got the better signals on the deeper targets and found the SE Pro could hear every target the E-Trac did, but the E-Trac gave the better signal on them.
A Person hears story either way on these 2 detectors and I find I like my E -Trac better myself, but that is me and how I understand it compared to the Explorers which are great detectors also.