No! This is typical behaviour of exporters who do not bother about identity very much and add confusing names rather freely to the list of official names.
There is P. gunawani, a not-well-known but well-described species, formerly known as P. spec. Danau Rasau. It’s a good species, the hitherto last one scientifically described. I received living specimen from the original collection by finder Horst Linke and bred them rather easily. It is well to be identified by a rather stout body and a special colouring of the edges of the unpaired fins of the males. It is known from one location in Sumatra only, the lake Danau Rasau. It was imported only twice by finder Horst Linke and since then possibly by commercial traders, but this remains unclear. The truth is that among the traded fish bearing this name were specimen which resembled the real gunawani very much, but they were mixed with others definitely not gunawani.
Then there is P. spec. “Blue line”, a hitherto undecribed species (or subspecies), bintan-like, with very brilliant iridiscent blue stripes, which was named “blue line” by the trade business for trade purposes. The fish appeared first in the pet shops in Europe via wholesaler Glaser (Germany) and were distributed in great quantities between 2005 and at least 2010, maybe even today, and subsequently in other countries Too (U.S.!). Its original locality is the district of Jambi on Sumatra (as it is the case with gunawani) but well separated from other forms. Nevertheless, there were often different forms traded bearing this name (for instance with very long or with very short ventrals). It is highly probable that they were mixed ba the catchers already when they left one locality to enlarge their catch at a second and third.
The “blue line”-fish are not safely distinguished from other undescribed forms from Sumatra, most of that have not been named by the trade and were freely mixed bearing this name or that. The fish mostly traded during the last years (from about 2009 till today) are the so called P. spec. Sentang (or “sintangensis”) which have less brilliant colours than the original blue-lines and are sometime referred to as the “Green speckled licorice gourami”. They come from Jambi too, but are not as clearly distinguished from other bintan-variants from Sumatra than gunawani or the original blue-lines.
To sum it up: The trade business is responsible for these mixtures and equivocations of names and fish, since they don’t bother about clearly separating the localities of the fish they trade. Their commercial interests are superior over the interests of distinction which should be from a scientific or preservational point of view. It’s a pity, but it’s reality. We cannot blame the catchers whose behaviour is the origin of these mixtures and failures, because they are paid cents only for a hundred or more fish. The true responsibility for the given confusion is by the export-companies, and – not to forget – the scientists of course, who have been unable to do enough research on Sumatra during the last twenty years in order to prevent such developments and get the relation between the forms and variants clear.
The newest development is what we learn here: that the trade confuses well-described P. gunawani and not-decribed spec. blue line. These two are definitely not identical. It is a superfluous confusion added to those that we have already. The reason is quite clear (becuse both forms are clearly and easily to be distinguished): to sell fish with the interesting new name “gunawani”. People want fish that are new to them, and “gunawani” is still new. I should not be astonished if the fish would be neither gunawani nor “blue line”.