Depth test on freshly buried,,say a silver dime.
Deus will trounce Etrac,,CTX, and White's V3i.
Deus happens to be a good loose dirt detector.
So by doing a freshly buried,,,this is all you can deduce.
On undisturbed targets that have been buried for years,,,different story.
Deus with 11" coil,,Etrac with stock,,CTX with stock,,all very similar in depth.
But the real difference is how they are reported for user's understanding,,and knowing what they have under their coil.
Even the old explorers are as deep as the more modern CTX is.
Emi in a place can drive results too.
Takes more than a few targets to actually make a determination.
Sweep speed too can be different between detectors to get signal on deepest targets.
Coil height as well.
Bottom line each model detector has strengths and weaknesses,,,and if a deeper target exposes a detector's weakness the odds of a user walking right by are increased.
Separation and unmasking,,,loads of variables,,,so many that it is not always a smaller coil that will detect some finds,,,rather a bigger coil.
The detector making industry sorta has it lucky here,,,,if detecting was so cut and dried from a detection scenario(more consistent/concrete),, there would likely only be a model or 2 of detectors made period.
BTW,,just because a person fills their finds pouch using one model/type detector, in a site,,,this doesn't mean all the detectable goodies are gotten.
Another model,,even another coil might find the already missed goodies.
And this is where the problem crops in,,,some folks think they have the supreme detector since they found maybe numerous finds in a site,,,,they really don't know what is left,,,they think they do.
To shed light here,,,pay attention to what some of the late comers to Deus are saying,,,some of these same folks used to think FBS/FBS2 units were getting everything coin wise in sites.
How wrong they were.
Some though are catching on rather quickly.
Hope this info helps.