They are both Aquaracers.
The Aquaracer started out as a 2000 Aquaracer, an extension of the 2000 Series - in the same way you had the Link Searacer or the 2000 Searacer. This was eventually scrapped and the name 'Aquaracer' became the new name for the 2000 Series.
I highly doubt the dial marking will have any meaningful impact on the price, because most people won't even know the difference.