Sometimes the markings are really faint and hard to see unless you get them at just the right angle, other times they will grind off the markings. You'll usually find the latter if they really don't want you to know what hardware they're using.I don't see any markings at all
the original Saturn controllers used a custom Sega chip that was essentially just two 74153 chips. I'd suspect this new device uses something different as I don't see Sega or RetroBit spending the money on a custom chip for a niche item like this.