Didn't watch the lonnnng video.
But here is my take comparing the 2.
Etrac loves high conductors.
Does not like lower conductors near as much.
Depth wise the 2 detectors are very similar,,,but Etrac can ID nonferrous object deeper and more accurately (not all the time) , but a good bit of the time.
EMI advantage Etrac.
Weight advantage Deus.
Cost
About the same
Deus better performer around nails and iron.
Smaller gold. Pewter, lead, etc Deus a better striker.
Both can handle ground with somewhat amped up minerals and still detect nonferous objects.
Learning curve
IMO advantage Etrac
Resell value
Edge to Etrac.
Warranty
Deus by 2 years.
Loads of aftermarket coils for Etrac.
None for Deus.
Expect to pony up the bigger $$ for additional coils.
Deus does have High Frequency coils available.
Can help a person depending on their sites or detecting goals.
Both in the hands of some one who knows what they are doing.
Both get grades of A+.
I will never show any disrespect towards either.
Both great detectors.
They complement each other very well in most sites.
Cheers