N/A gearboxes also had a lower first gear than turbo boxes, but N/A gearboxes are sought after because of this. A bit better for low speed off road.
N/A's also had 4.6 diff ratios, turbo's had 4.3... Up to you which ones you prefer, personally I like 4.3's because of the lower revs at highway speeds and they're still fine for the offroading I do.
Other than that they are the same as far as I know.
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