I don’t think it would affect priority at all. If you have the 630, that’s what puts you in
priority. They don’t know or care what else you have.
The priority thing is a bit silly. They want to sell you that pump. The idea of “priority” was simply to get people to sign up. If you don’t have priority, you can still get the 670, just a little bit later. Big deal. You will always be able to get a pump from Medtronic, I promise. Maybe a little later, but you can still get it. Don’t let them use “priority” as a scam to keep you from trying something else!
BTW, if you want to keep your D hidden, there is no question the OmniPod is much sneakier. Tubes are a big giveaway.