var buffer1 = Buffer.from('ABC');

var buffer2 = Buffer.from('ABCD');

var result = buffer1.compare(buffer2);

​

if(result < 0) {

    console.log(buffer1 +" comes before " + buffer2);

} else if(result === 0) {

    console.log(buffer1 +" is same as " + buffer2);

} else {

    console.log(buffer1 +" comes after " + buffer2);

}

​