Yeah, most of the SD cards are just recording your sleep hours, it's used for compliance to verify you are using the machine and they are not wasting money. Some of the higher level machines will record other data, but these aren;t the ones the med suppliers sell to most people. They get a fixed price from the insurance company regardless of how nice/fancy a machine is, they sell the cheapest no frills machine and send the same $1,200 bill to the insurance company. I can still remember the sales pitch the supplier gave me before I knew the rest of the story.
You can get your pressure settings off the old machine and transfer to the new. I just looked up that page I referenced and they have the S9 details listed.