Jrebot2,
Oh, how the love abounds
)
There are several different products from a handful of companies and variation’s on how they approach the IMS problems. I would think each chooses what they feel would work best for them to get the desired outcome. The is a lot of info to be found and I have spoken with most of folks hwo design the IMS options and they were very helpful. Each feels they have the best product as they should. We get to figure out which would work best for us.
Enjoy the journey.