I'm going some work on the Akai gun, so I haven't shot them side by side, nor have I put a lot of rounds through it, but from memory I'd say muzzle flip is about the same, but the Akai is much softer (less snap or straight back push).
It's going to be hard to compare those two because while they both have two 3/16" holes, the Akai has a 4.9" 38 barrel while the other has a 5.4" 9 barrel.