NuVinci & Rohloff are both 2 cable Pull/pull so rotation is a setup choice
single cable have a spring pulling back ..

Im fine with my S-A AW 3 (& rohloff) THE S-A 5 Speed adds 1 more gear over and below the other 3

The 8 speed is all overdrive gears above 1st. best use: small wheels as the low gear is at best the wheel diameter if the cog and chainring is the same size.

The hub will have its Chain line, it may be slightly tweaked if the cog is dished, by flipping it over , the front crank is set up to match that .
the spindle length, the crankarm choice, which place on the spider you Put the chainring, and some shim washers between chainring and crank arm spider allow adjusting That.


Rohloff is evenly spaced , as you go down each gear is 86.4% of the next larger , or Up from from 1st 13.6% larger

NuVinci CVR is a continuously variable IGH 360% the chainring /coc Drive ratio is the middle one, that determines the gear range

Likewise No 2 in a 3 speed and N 3 in the 5 speed

R'off its N 11, as the 7 speeds are used a second time in a compound reduction gear low range.
the 7~8 shift is a double lowest-high to Highest -Low.