Pre arranged marriages are not always the best thing. My sister had two cats, one died and she got another and the other cat just hates the new cat, won't have anything to do with her.
Since It's a boy girl thing, I would think your dog would be fine with either.
Remember girl's usually rule the roost.
I can't see them not letting your dogs meet, try to make it a low pressure neutral place if you can. I am sure they want the dogs to end up in a good situation, if they are responsible people.
Originally we got a male and when we brought home the new dog/female puppy, he was great with it right off the bat. He even scalded/corrected her when she did something that they were not allowed to get into or do. They played and had a great time. He was very gentle with her. I can't say the same of her- those puppy teeth were sharp.
Who knows which dog he would like. Also if you let the dog choose you can't blame each other down the road.