One possible approach:
if (Math.abs(value1 - station.number1) <= comparison
&& Math.abs(value2 - station.number2) <= comparison) {
//...
}
... but be aware of possible edge cases caused by float-math imperfection. For example:
var value = 0.9;
var reference = 0.7;
var delta = 0.2;
console.log(value - reference <= delta); // false