I don't think you can really draw comparisons, until your children are adults!
I had a boy, then a girl. Only 19 months gap between them.
They are now aged 21 and almost 20.
Toddler years were much the same. But as time progresses - through school etc - girls are far more emotional. There's not much drama with boys. Girls are always falling out, and changing friendship circles. Cue much upset, and needing to talk things through, for hours on end (with Mum). Teenage years much the same. But that's women, isn't it? We are far more emotional and more likely to dwell on things and pick things apart. Man are, ahem simpler.
Now adults, they are both emotionally settled, but Son has a long term serious GF, and whilst we text almost daily, he's always too busy to come home (he's at Uni). Daughter, on the other hand, is farther away (at a diff Uni) but we see her more often. She needs that connection with me and home. We do things together, ranging from watching the same trash TV, gossiping, clothes shopping, doing each others hair etc, and she's my best friend.
"A Son is a Son until he finds a Wife, a Daughter is a Daughter for all of your Life"
I love my children both the same, but I do tend to agree with this old saying ^^