I use whichever one I pull out of drawer first
Of late its been Nichrome .. coz I have more of that .. so the law of chance says thats what comes out mainly
There are some thoughts that say the ( @
stealthvape correct me if I'm wrong!) Nickel content in Nichrome may cause issues with people that have a nickel allergy .. but then Kanthal contains Iron ... which can be equally allergic. It think its irrelevant - hence why I no longer give a crap which I use.. Ive never heard of anyone having a reaction to either in regards to atty wire.
I did notice (tho I havnt checked recently) that Nichrome seems to hold its Ohms better with less jumps .. but that could have just been me