aww yeah they are so similar! well..after worrying like mad after all the bad stories i just thought id give it a go...as i suppose it depends on the buns?!
i introduced them young..10 and 16 weeks on neutral ground..then put them in cages next to each other swapping them into each tohers cages and then just supervising 10-15min meetings in the kitchen where they will live..lots of mounting my my older one and some bum nipping by my older but kept doin it and sitting with them..make sure ur calm..talking and cuddling them!
im happy its gone well as iv heard some bad things but i just think u should try it slowly and always be there until u feel happy
good luck!