Not really =/ the Dragonballs can give you anything except killing someone and asking for more wishes.
The Hougyoku influences the situation as far as it is possible. Ichigo already had the potential to become that strong, the Hougyoku didn't create that, but just influenced it. While the Dragonballs would have created it.
As Aizen said things that are not within the limits of being possible can't be granted by the Hougyoku, while the Dragonballs can => for example wishing dead people to life.
Also the Dragonballs do it in an instant, while the Hougyoku workes like a relatively slow proces.