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Not really, a twin scroll turbo separates the cylinder pulses and is thus more efficient but at the end of the day the "total exhaust energy" delivered to the turbine for each given level of constant load (by this I am referring to the desired load given by accelerator pedal position that the ECU tries to interpret) is completely non-linear, and even a slight amount of lag makes it worse.
But response aside (which some people don't care about, and that's fine), a twin scroll turbo doesn't change the fact that the turbo can only be optimized for a narrow range. You need a variable geometry turbo to fix the high end vs. low end tradeoff.
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