Thank you Macpack, It really depends on the characters like you said and I think that the guiding of the family is very important too.
I would say, two boys can go very well together!
We have two adult Basenji males (same dad, different mom) and until now (the youngest one is 3 years old) we never had a fight.
Never, not with food, not with other dogs (sometimes when they are both on a short leash and they meet a agressive dog they are using the energy to growl to eachother)
I have to say, Buana is in a higher position as Chafuko seen in the old fashioned way, but we are using the (i don't know the English word) "new age" ideas. (kalming signs, Turid Rugaas etc etc)
It is not much a staircase where we all have our position and try to be the highest but we are a family, we guide eachother and we (the alpha's, the parents) are guiding our kids (the dogs, our son) to be living as a family, and they trust us so much on this task they only use their voice when they are not liking the move one other makes and the other knows enough.
They trust us to keep them safe, guide them, learn them etc.
We have rules and everybody has to live up to them, if they don't we use our body languages and our voice to explain what is wrong.
I find it hard to explain but I hope you understand.
Outside off the leash with other dogs, we just let them be themselfe, what they have learned from us and eachother.
We have met agressive and very dominate dogs and Chaffie is then trying to get them loose and be the happy playfull pup, Buana is different and goed to smell the dog out and is carefully looking who is the one that has the better cards, sometimes he will let them be the idiot (okay, well then you stay an idiot and I won't play with you) or he gives a growl to let them know, look buddy, I won't harm you but please keep your mouth shut.. they can be very vocal sometimes haha
Just guide them from day one, an adult dog is most of the time passive to a young dog.
When we were on the waitinglist for Chaffie (we didn't know back then if it would be a girl or a boy) everybody keeps telling us, you really can't put two boys with eachother…
I won't say a girl is a more secure decision but it is possible to have two boys without a fight
Have fun searching for a friend!!!!