Excuse me, but what 9mm round is NOT low recoil? The 115 & 124 grain round is not much heavier in recoil than a 22 Long Rifle.
Is there any drawback to low recoil 9mm ammo? I dont know this particular round, but the 9mm has a reputation for taking full magazines of full power ammo to stop 1 attacker- in no small part due to numerous news reports of people being shot 20+ times with 9mms. If "low recoil" means lower power, then does it mean "lower power than barely adequate"? In that case, I would say, "Definately yes, there are disadvantages to this ammo." If you need less recoil than full power 9mm, then you may as well consider the 22 Long Rifle.
Yes, the 9mm carries more rounds and energy than a 38 Special, but the 38 has a much better reputation. Reason? Bullet design. The 9mm bullet must feed from the magazine to the barrel and that requires a certain angle and hardness of material that are not required of a 38 bullet, which can be pure soft lead in a semi wadcutter hollow point design if desired. The 9mm bullet design is therefore far more complex and consequently more difficult to get to open up even in full power ammo. Some 9mm ammo works, but many designs do not work. Given the obvious difficulty in designing full power 9mm ammo that does work, how much more difficult is is to get sub-powered ammo to work:?