OK, I looked at the various Q-jets I have, there are at least two styles. The style I was thinking of does have two metal tabs on the bracket, with the ips bent over the "rails" on the choke pulloff itself. If you were to spread the ears, the choke pulloff would slide out towards the passenger side, as installed on the carb/vehicle.
The other style looks like it has some sort of molded plastic piece. Doesn't look to be removable. Can't tell for certain, but it doesn't look like it is removable without destroying it.
You've probably only got one choke pulloff, and one is the secondary air valve damper/shutoff. I would guess they aren't interchangeable, the "throw" and angle of the rod connections are likely different. If they are externally identical, and the "throw" is the same, then they probably are interchangeable.