I think more correctly I was misinterpreted because I don’t give wrong advice.
The context of the advice is important. Felix asked if it was worth the trip to sell the 800 and get a Deus as he was frustrated with his lack of quality finds. What I said is that 1) Deus is my preferred relic machine for several reasons but primarily because of its ergonomics, performance in iron and high mineralization soil (which defines the conditions in which I most frequently hunt), and expressive audio. 2) I was pretty clear in saying that I thought the Equinox and Deus complimented each other because the Deus excelled at things the Equinox didn’t and vice versa. They both have high versatility. That makes it hard to choose a clear favorite, I will use whichever of the two is best suited to the conditions at hand. I can afford to own both, so I do. I think an experienced detectorist can be successful at a productive non-salt-beach site (Equinox rules over Deus in salt water and wet salt sand) with EITHER detector. 3) Finally, what I told Felix is that if he dumped the Equinox and went with the Deus that it would not result in a step change increase in finds over the Equinox based on what I knew about Felix site conditions and target prospects, so it was not worth the trip to trade one for the other in his specific case, especially when you factor in the significant price delta between Deus and Equinox.
At the time I was providing my recommendations, the Nox 5x10 coil was not in existence. It is truly a game changer and under certain high target density circumstances closes the ergonomics, target separation, and iron performance gaps between the two detectors.
None of the above should be interpreted to mean “they pretty much do the same thing”. That is a gross, blanket over simplification of a complex “it depends” subject. Context and situation specific details matter in regards to when one should be chosen over the other for the task at hand.
Bottom line, I recommend owning both if you can afford to and have to detect sites with widely varying conditions and target types because owning both pretty much covers all the bases. I don’t really think it is worth the trip to sell or trade one for the other unless you only detect in situations that favor one over the other (e.g., exclusively salt beach hunt, you are better off with Equinox, exclusively hunt highly mineralized high iron sites, then Deus May give you the edge.)
Hope that sets the record straight and helps the OP and anyone pondering trading or selling one for the other.