Well, first let us define "safe". Yes, your coil is going to be fine on both mods, since they are regulated. But remember, these mods are not toys. You need to take care of them and take precautions to make the as safe as possible. Keep your mods in good condition, don't toss them around and only use high quality high drain batteries. Sony, Samsung, LG are proven brands and your best bet to make your vaping as safe as possible. Check your battery wrappers often for tears and repair or replace if the wrapper is damaged. A damaged battery can go into thermal run even in a regulated mod. (current arcs from a tear in the side of the battery, up the metal mod casing and to the positive terminal = bad juju) The 3 brands I named, can go thermal, but they vent out rather than explode. This means you have lots of time to react and dump the cells out of your mod, or toss the mod into a sink, toilet, metal coffee can, onto the lawn, whatever, before any injury occurs.
Also use a proper, good quality charger for your batteries or the charger supplied by the manufacturer.
Now I'm not trying to scare you, just stressing the point that nothing is 100% "safe" but you can do a lot to make your vaping as safe as it can be.
I have only seen 1 regulated mod battery go thermal in nearly a year of online research, a failed IC board was the suspected cause. So even though it is very rare, these things can happen.