NXT and Zaino are both polymer type waxes. Zaino smells nice too.
I personally prefer Zaino to any carnauba based wax I've tried. I like that the Zaino lasts longer than traditional waxes (I'm lazy).
My advice, try a few and see what works for you.
Maybe we should set up a 'wax exchange' where we could donate our half used wax products so others could try without buying.