Turbos tend to be more efficient in terms of output vs parasitic loss. Outside of that...
Turbocharger advantages:
Less expensive
Easier to maintain
Boost level controllable by wastegate
Supercharger advantages:
Linear power output
Easy to install
If I were to choose, I'd go turbo even though the systems are a little more complex. However, since you're running full duals it might be cost prohibitive to try to run a twin turbo setup. That's up to you, though.
Good luck with your decision.
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