If all you do is compare customer reviews you won't get "hard numbers". These are people who often don't know much more about how a tire works than the fact it's mounted on a wheel, goes round and round, and wears out regularly. Buying decisions are usually made on Brand Name, Price, and mileage. I know as I retired from 40 years in the tire industry.
Unless someone has tested the tires with a sound meter inside the car you have no real way to determine what tire is quieter and which is not. Road surface, inflation, how many people and how much luggage is in the vehicle will all change the perception of sound too.
The top names in the business make tires that are as quiet as can be. In fact there is probably very little difference in "sound" when tested in same conditions.
Good luck in your quest and also, in 4 years everything will have changed so you will really need good luck.
Lastly, in your quest for "silent" just remember that you may be sacrificing low rolling resistance. Might be better off just spraying sound deadening material inside each wheel well and buy the best low rolling resistance tire available that also provides good wet/dry, temp, and wear performance.