i'm not exactly sure how different this would be. i've seen quite a bit of hume dragoons on my server(bismarck). more than any other race. i think i've seen like one elvaan dragoon. i'm guessing that all the races are pretty well balanced. you'd have to look at what stats are important for a dragoon as well as sam but i was reading
this article on jobs and sub jobs and here is what is has to say:
--n. Dragoon/Samurai--
One of the best Dragoon combos! Huge TP allows for multiple weapon skills such
as the great Pentathrust, which will pile on damage. Great attacker. And you
can use Super Jump to shed hate.
so i guess that's that =p