Currently, there are only a few CFexpress Type-A cards. These benchmarks are taken with an AJA system test with a Macbook Pro, using the Prograde CFx Type-A reader. The tests are run using 4GB files sizes with the Video Frame Size at 3840x2160 10-bit. The test is performed several times and the fastest results are chosen.
If you're buying the Z9 today, you'll want the 128GB Delkin Black CFexpress cards. They are currently the fastest card and should give you around 80 RAW lossless shots per burst. If you need a memory card larger than 128GB, the Prograde Cobalt or Wise Pro cards will be the fastest.
The Sony FX3 like the A7sIII uses a dual memory card configuration where it can take UHS-II cards or CFexpress cards. But do you really need CFexpress Type-A cards for the FX3? Buying memory cards for the Sony FX3 is a little tricky and this guide should help you find the best cards for your situation.
The Fujifilm X-E4 has some very powerful features packed in a small little body. Since the camera has some pretty aggressive features with some nice 4k video recording options, choosing the right memory card will be important in order to get the best performance out of the camera. Use this guide to find the best memory cards for the Fujifilm X-E4.
The Nikon Z 6II and Z 7II now have the ability to take both CFexpress / XQD and UHS-I or UHS-II memory cards. There are a lot of different speed classes and ways to configure your camera to run with these UHS-II cards. This guide should help you get started on what you need for how you like to shoot so that you don't buy more than you need.