Freebase vs nicsalt (0.6,0.9) ohm caliburn g4 mini

I want a long lasting pod life which liq should i use freebase or nicsalt i can either buy 0.6 ohm pod or 0.9 ohm pod for my g4 mini which operates at 25w for .6 and 15 ig for .9 also which is better for smoke tricks freebase or nicsalts and a better nicotine satisfaction/hit am new to this so pls help