I believe your fin nipper is a male Filamentosa. It's more popular Cousin is the "Mascara Barb", which is more or less a Filamentosa with a black blotch on It's eyes.
The Rohani of course you are dealing with now.
I believe there are a couple of other Dawkinsia species.
It's been my experience that Dawkinsia are very durable & adaptable Barbs. They are voracious eaters and will eat just about anything you throw at them.
The males are more colorful & little larger than the females. The males also have black Filament rays laced in their dorsal fin, which becomes more pronounced when chasing females. Great species to keep.