Definitely the Efest is the better charger. The only advantage the nitecore has is the ability to charge non-lithium ion batteries like NiMh rechargeables and stuff but that's completely unrelated to vaping.
The Efest can do 1A per slot with all 4 slots. The Nitecore I'm pretty sure is actually 750mA divided by 4 so it's a very slow charge with 4 batteries.