i beg to differ. the engine is going to make the same amount of torque no matter what. a lightened flywheel presents less inertial mass to resist the engine revving as you accelerate, so it revs quicker. a lightened flywheel also stores less kinetic energy, so you may have to plant your foot a tiny little bit more as you go up a hill
having driven a torquey 4k with a lightened flywheel which could climb most hills in 5th, and knowing a 4a is a bigger more torquey engine, i'd say it's a non-issue in a light car like a corolla. i heartily endorse this event or product
as for brand, who cares? get whatever's cheapest and available to you
they'll all do the same thing, and if you're precise enough to be able to pick a few hundred grams between aftermarket flywheels, then get a custom one made to your exacting standards