It boils down to how much responsibility for the vape you are prepared to take.
Get a regulated device - it'll refuse to fire an atty it sees as a short. It'll cutoff when your
batteries get low. It'll compensate for a rough old build you whacked in there. But it won't make you a cup of tea. Fragile.
Get a mech - it'll fire anything regardless, even if that vents your battery. You have to decide when to recharge the batteries. A crappy build will give you the crappy vape you deserve. It won't make you a cup of tea either. Durable.
If you can make your
coils well, accurately to target and consistently, you don't need puff counters and all the rest.
T