Ss and kanthal with the same gauge, coil id, and wrap number will work at the same wattages. They have roughly the same coil mass, and the same heat flux.. Resistance doesn't matter that much.It sounds like you are using the same wattage in both the Kanthal and SS cases... (Correct me if I have guessed it wrongly). With the same dimension, SS coil always have lower resistance than the Kanthal thus less heat and of course less vapor. May be you should set at higher power for SS coil.
My experience is, different mod handles coil in different optimal ohm range. e.g. my smok H-priv mod can never handle a coil with less than .4ohm nicely. No matter how hard I try (setting different TCR), I always fail to run TC mode smoothly with this mod at lower than .4ohm. So, if your tank deck does not allow you to use a coil (particularly if you want it to be a space coil) with many wraps, chances is, your coil will be at lower resistance range and if your mod can't handle that ohm range accurately, that it is, you will have problem in getting good vaping experience with SS coil.
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