Well you are definitely short-shifting, but unless the engine is jerking or shuttering, or pinging like crazy, I suppose you wouldn’t call it exactly “lugging”.
But it’s a pointless way to drive this car.
Most efficient is neither little throttle or full throttle.
Most efficient is to accelerate at 1/2 throttle, then shift.
Well the Cayman is probably the better choice overall but the base 718 sounds like bees in a can. I couldn’t live with it.
How about a city/county job?
I think you are subject to emissions regulations as well and I believe (please check this out yourself) that Penna follows the same regs as California with regard to emissions.
his may also affect the resale value of the car.
Do not apply excessive force on either the gas pedal or the brake if the car is not pointed in a straight line.