No not the same tech.
Both do Hardware Decompression for more raw speed.
But MS gains 2 to 3x more SSD
performance not raw speed thanks to memory management of 4K textures Sampler Feedback Streaming is a part of Xbox velocity Architecture.
That's why I think that in game streaming assets XSX maybe have an advantage thanks to this technology.
The xbox velocity architecture was really designed for game assets streaming, much more than the loading time.
Enter Xbox Velocity Architecture, which features tight integration between hardware and software and is a revolutionary new architecture optimized for streaming of in game assets.
Sony really really uses ultra fast ssd for game streaming and also load times.
Microsoft is more in efficiency and an innovative way.