If it were me, I would go with the WRX because of the added power of the turbo engine.
Subaru has been doing turbo for a long time, so the engine is reliable. The specific vehicle he had for a long term test vehicle was the WRX limited.
It's gonna cost you another 10 grand up on the Impreza, but it is well worth it. But since you are leasing it anyway, it shouldn't matter.
The Impreza's standard naturally aspirated 4 banger isn't gonna be much power, especially when it is powering 4 wheels. Which is why the turbo WRX is the better option.
I was just fucking around and built a WRX for $32,000. But again, you are leasing so it's not as bad.
Options are limited, you don't need blind spot assistance because you're not a woman. The rest is all alloy wheels, which is really just cosmetic. HID headlights I would recommend. Auto trans obviously.