I think some of your examples are a bit weird - I always assume most men are more comfortable changing in front of mates than women are, based on my experience of changing rooms!
I think all friendships are different, depending on the age, personality, etc. of the people involved, not their sex.
I have a lot of friends, and now a DP who were/are stereotypically 'rugby lads' and, although they have (mostly) grown up a bit now, in our late teens/twenties they were far more touchy feely between each other, similar to the way you describe than I would ever be even with my closest female friends/sisters - think wandering around naked in front of each other, touching each other's balls/dick as a joke, sleeping next to each other in only their underwear, etc.
Even now in their thirties they are very comfortable hugging each other, sharing a double bed if necessary, e.g. on stag dos, telling each other they look good in various clothes etc. (while also taking the piss when they think they don't!) and, while maybe not emotionally supportive in the same way as women in terms of talking about their feelings, do show it in different ways, e.g. my DP took some beers round to his BF's and played on the xbox the day he found out his gran had died, and then went to the funeral to support him.
It works the other way too, I have very close female friends but am just not a touchy feely person, so would be a lot less likely to engage in what you class as 'intimate' (weird word for it) physical interactions that my dp with his male friends. It's just different personalities, not necessarily based on gender.