意思上两者是一样的.
haven't是英式说法,don't have 是美式说法.
疑问句型:Have you xxx xxx (英) Do you have xxx xxx?(美)
反意疑问句型:Haven't you xxx xxx (英) Don't you have xxx xxx?(美)
e.g.
You have a pen.
(英) You haven't a pen.
Have you a pen?
Haven't you a pen?
(美) You don't have a pen.
Do you have a pen?
Don't you have a pen?