Did you do a search on the site for these 2 items? I never heard of either, and although I'm brand new around here, I've done a lotttt of reading in the last day and a half.
I looked at them on the net and the Smokers Saviour is way too expensive for what it seems to be, and the Eluma sorta looks finicky/cheap to me.
I understand all the terminology and stuff surrounding e-cigs is difficult to ascertain, but I'd suggest you read around the
reviews of the e-cigs the members here are using and figure out what you really want. E-cigs are refillable, and there are 0mg (nicotine free) e-liquids of all flavors you can re-fill them with if you prefer to smoke it without nicotine.
I guess some come with 0mg cartridges (Can someone help me out here??) also.
A little pointer I can give you is to direct you to read
reviews of the Joye 510 first (as it seems very popular) and then read some reviews of others.