Yeah Furcata is the first picture and Threadfins are the second. :)
Those Threadfins are two males displaying at eachother. They do that a lot if they feel secure in the school. :) The colors will only come with good diet and water quality though. Usually the ones you buy at the fish store are much paler until you've had them a few days. Love love love them!
Threadfins are a bit longer than furcatas though. I think furcatas are more suitable to something in the 10 gallon range. I'd get 15g or more for threadfins to school better.