@KLJ
Mark has given his view. . Mine is a little different.
I think that the Duraclick EDC is markedly superior to the Stratus ... even the pricing tells you that.
Mark gave some attention to the shoulder dimension ... to me that is an important feature because I like a bigger diameter pen.
As for plating options, I would say that is an aspect in which the two pen kits are not even comparable because the Duraclick EDC is not offered in any of the plating options in which the Stratus is offered (chrome, gold, gunmetal, and black enamel).
Most of the options for the EDC are, what I would call, raw-metal options: stainless steel, natural aluminum, brass, black anodized aluminum, and a bronze-aluminum (a new finish not available on any other PSI kit). . The fact that these are mostly "raw" metal finishes could, depending on your point of view, make the EDC considerably more desirable than the Stratus.
Another superior feature of the EDC, in my opinion, is the clip: a solid metal, modern looking clip. . The stratus clip, on the other hand is a folded metal clip.
Another majorly superior feature of the EDC is the click mechanism, which is well-recognized as very reliable and quiet. . It is made in Germany (as far as I know) by the Schmidt company, model number SKM-88 on their website.
You pay more for the EDC kit than you do for the Stratus kit for a very good reason ... superiority.
Keith, I really do think that you owe it to yourself to order at least a couple of the EDC and make your own comparison .... I am sure that you will be thoroughly impressed by the EDC in comparison to the Stratus. . If you sell your pens, the price difference is significant. . But so will the level of customer satisfaction be very significant. . For me, just the quietness and smoothness of the EDC click mechanism is a totally winning feature, compared to every other click pen kit on the market.
Some people don't like one aspect of the EDC, namely that the external "color" of the click mechanism is not well-matched to the rest of the kit parts, except for the stainless steel version of the pen kit. . For me, this is a very minor issue. . In the case of the stainless steel version the match is very good. . Frankly, among the various EDC options, I actually prefer the stainless steel version, even though it is the most expensive.
Remember that you are getting a quality click mechanism from a longstanding well-respected German company.