I use the 997, which is perfect for me. It helps to control my damaged belly muscles and it slightly slims the hips as well, which is a major bonus for me as my hips are one of my primary sources of dysphoria. Overall, it gives me a more straight up & down profile.
I do recommend shortening the 'sleeves' somewhat though. It's designed for an average sized male, but I'm very short so the distance between the chest and the top of the 'sleeves' is a bit long. I've shortened mine to make it fit better and to flatten a bit of the bulge at the top of the chest that is characteristic of many binders.