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It depends on the engine as much as it does on whether one drives with AT or MT and makes use of shortshifting.The mid range can use more fuel than the high range turbo as it kicks in at lower revs and is “active” for longer,hence more fuel usage,this also applies to superchargers.
Even with AT you can find cars that are both faster and have a better economy with the low rpm turbo comparing to the other both, or the other way round.
But then there is propably also tyrewear to consider if fuel consumption is enabled, and different turbos can produce different tyrewear.