I doubt it'd be perceptible, it would just be nicer/convenient to use, especially if it has a gooseneck pourer. Some people do say bringing water to 95 deg is better than bringing it to the boil then cooling to 95.
It would also be good to have a dedicated kettle that only ever sees filtered water.
I'd be surprised if you could get a good extraction with 85, most top dawgs say 92-97 I think. That's pourover - Aeropress can be a little cooler because the added pressure from the plunge extracts more.
I doubt it'd be perceptible, it would just be nicer/convenient to use, especially if it has a gooseneck pourer. Some people do say bringing water to 95 deg is better than bringing it to the boil then cooling to 95.
It would also be good to have a dedicated kettle that only ever sees filtered water.