Here is what I wrote up earlier (before the thread was moved):
Holes:
I believe the holes will be compatible, as they are on the standard 11" centers on most (all?) brands of plates and wings, as far as I know.
Camband slots:
I believe slot placement is not standardized, like the hole placement is, but is instead variable on various plates (and sometimes they do not exist at all). That said, the cam band "slot holes" in the DSS wings are open rectangles, so there is some room for "adjustment."
I have a DSS Torus 17 wing, and I could measure the camband "rectangle" locations for you if you like. Then you could compare them to a Halcyon plate's slot locations. Note that the Halcyon plate's camband slots may be different between their regular and small plates, and/or may not exist at all.
If you are using an STA, then the camband slots may not matter to you. OTOH, if you are using an STA you would need to modify the DSS wing (remove the "rubber" tank cradle), and you would lose the signature DSS feature of being able to quickly and easily peel the wing off the plate.
Blue Sparkle
PS: I have a DSS plate and have used it with both a DSS Torus 17 and an Oxycheq 18 wing. I use an STA with the Oxycheq wing, but not with the DSS wing. I also happen to have an Agir-Brokk plate and that does not have camband slots (but does have the 11" OC holes, even though it is a metric/European plate).