I think they can both enjoy the same basic necessities in life but other than that, psychologically their paths go seperate ways, conversation is going to be going over each others heads and they are going to make each other yawn.
i.e Joe A talks about his big visions and plans whilst Joe B doesn't care or understand
Joe B talks about the The Voice that he watched last night whilst Joe A doesn't care or understand
So if we look at it like that, all in all, a pretty meaningless conversations happening, one doesn't get the other.
When we are starting out we find ourselves in these situations all the time because the vast majority of people are slowlaners, which is surely a good thing for the rest of us. Fastlane wannabes and apprentices (like me) and real fastlaners are much fewer and further between so it is more diffucult for us to encounter one and other in the beginning due to the numbers in the favour of slowlaners. Therefore we have to co exist peacefully with one and other.
Fastlaners need consumers, consumers need producers. One cannot exist without the other.
In terms of relationship I think we just have to bear with it and accept each other for who we are and that is what happens and our social groups reflect this as we grow older. I am alligning myself with fastlaners as much as possible because they are the people that are going to point me in the right direction to help me get what I want, but slowlaners are going to benefit from the things I do (which in turn will benfit me). To me that is what relationships are founded on, mutual give and take.
So, despite the different perspectives, I think that the relationship between Joe A and Joe B could be meaningful, although, not natural in terms of social enjoyment.