It's dangerous comparing people. You can't compare other Amriters! Just because you like someone more than someone else - isn't that more of an glitch in life - like the accident of being born into the royal family...
I agree, one person can be wonderful to one person and a nasty bum to other.
In general, comparison is good because it helps you understand. That doesn't mean it's a good idea going around pronouncing judgement on people, but comparing people's ideas and perspectives can be enlightening.
It can add an expectation or fuel resentment, even with good intent behind those comparisons. Comparing often leads to putting one above the other