The twins have done several gay porn scenes together. I remember them tagging Brent Everett. They finished the scene giving Brent a massive facial of twin loads. Luca (the gay one) stayed on in porn longer than his brother did, I think as recently as a couple of years ago.
But, yeah, I agree, the CF scene with Dawson and Cain in Costa Rica was their best. I love it when the off-camera speaker says, "Raise your hand if it's your first time getting fucked." Only Liam (the straight one, the short-haired one) raises his hand. He gets paired with Dawson, as the more experienced model. Then Dawson says to him at the end, "How was the first time cumming with a cock in your ass?" Those are the little moments that always take gay porn to a higher level for me. CF does them well.