There was another batch of "early" G-14/ASs built by Erla in the 460xxx-462xxx series, all recognizable by the standard lower nose cowling with flush surfaces.
Most, if not all the G-14/ASs built at Regensburg (identified here as "late"), had the lower cowl with the double "chin bulges", usually associated with the DB 605D engine. This modification wasn't due to any other technical factor than the fact that such cowls were available in quantities, since in Regensburg there were also the production lines of all the K-4s. In fact, the G-14/ASs had no need of those bulges, used in the DB 605D to accomodate two water return lines which protuded from the cowling's outline through a "slit" in the metal...
As a proof of that, there are several photographs of G-14/AS (recognizable by the lower oil filler cap due to the smaller "horseshoe" nose oil tank) showing the "chin-bulged" cowl open and no return piping where it should have been (nor any "slit")...
The differences could be summarized in this scheme:
Hope this helps.