They said I would not see a difference. :cry:
Here is what they wrote:
Thank you for your interest in Beltronics! Revisions are not only based on software but can also be linked directly to hardware. Any change in components, suppliers, or software changes require a revision. Most revisions are for internal technical support and will not be recognized by the end user. Our Customer Service Department does not keep track of the revision numbers, because they will have no effect on performance or features. I hope that helps.
Customer Service Department