I conducted some experiments comparing OS's smg recoil and 0.75b's.
I crouched and shot SMG on the block at the same disatnce, but destroyed block's height seems different.

// Openspades

//0.75B

// Comparison (L-OS, R-0.75B)
// OS reached 4-height blocks, but 0.75B only reached 2-height blocks