I got my EJ 3one6 for less than the cost of a Lupo and really really like it. I can't see a Lupo or Game Changer replacing it. Had I not scored the 3one6 at a good price out of Ireland, I probably would have a Lupo today. I'm sure it is a good razor but, it isn't the only premium stainless option at a good price. Even a gently used Muhle Rocca is in this price range frequently which is another really good razor IMHO.
Glad you get great shaves with your 3one6 and found it at a good price. Retail wise, the 3one6 is still more expensive over any of the Lupo’s. As a point of entry for one that is entering into premium alloy territory, the Lupo series is still arguably the best bang for your buck razor. First, the Lupo is a fully CNC machined razor and not a mix of CNC & MIM cast production. Not faulting MIM manufacturing but, there is better consistency and much tighter tolerances from CNC machining over MIM casting especially when EJ decided to use casting on perhaps the most important part of the razor, the base plate. Risky decision but, so far it has worked for them. I can’t speak to you intelligently concerning the EJ 3one6 and its shaving attributes as I’ve never shaved with one and do not see myself in the foreseeable future acquiring one.
But, glad that it has established itself as your go too razor and it provides awesome shaves for you.