Greetings,
The product can be expected to meet/exceed the applicable functional and performance specifications in effect at the time of manufacture.
While unlikely to impact primary electrical characteristics, there are differences that a person may or may not care about for a given application. It’s not within a manufacturer’s abilities to guarantee that all users will be indifferent to such differences, so rather than making statements to such effect the typical practice is simply to provide courteous notice of a change occurring, and leave it up to the user to decide whether or not it matters for their purposes.