Maybe, but it adds no argument to the issue of the same lang vs different langs. There's no clear purely linguistical distinction between dialect and language. As an old joke goes a language is a dialect with an army. In other words when it has a separate political status, and governed by a separate body - it's a language, no matter how similar it to other languages. The reason is that a literary/official language is defined by rules, and as rules are defined by separate entities, existing differences will be preserved, and new will emerge, and multiply eventually.