Am I being too sensitive?

Me and my siblings are extremely close, we go on vacations together or we’ll sometimes pick one of the siblings house and all stay there together. The two youngest of the family is my son who is 3 and my niece who is 2. I feel there is some favoritism going on between my son and niece. We recently went to Atlantic City this past weekend and the whole trip my brother kept saying about my niece “she gives the best hugs ever” I’ve never had a hug as good as hers(mind you my son had just hugged him about 20 mins prior) or he makes comments about my niece saying “this is the cutest kid I ever seen” while my son is less than 10 feet away. Then my other brother, while we’re all in the hotel room in front of everybody kept saying “ olivia(my niece) is so funny she has the best personality” or he’ll say “you gonna come stay the weekend with me” to my niece while my son is standing there. I had my son and my niece in my sons wagon and I was pulling them around and my sister walks over and picks my niece up out of the wagon, when my son wanted to be picked up too, she said she can’t hold both of them I also notice whenever my niece cries every one runs to see what’s wrong and try their hardest to make it all better, even if that means offering her ice cream(I do it too but I also do it with my son as well). But I noticed when my son cries nobody even looks his way. The reason I’m asking if I’m just being sensitive is because there can be various reasons why they treat my son differently. 1. He’s 13 months older than my niece 2. He’s a boy and 3. My niece does have an amazing personality(not saying my son don’t). But yeah what do you guys think?