Very impressive plants, and even more so given you are getting them to flower indoors.
It is not trivial to keep those Pachypodiums going in cultivation. The fact they're doing so well is a tribute to excellent care.
You are right about the red flowers appearing on two species. Thank you for pointing that out and I will make the change.
My comments on P. windsorii were based on when it used to be a variety of P. baronii, which it was for a while, and not a separate species. That is new to me and something I need to get used to.