Which Gourami?

[Savannah80]

Hello, we're novice tropical fish owners. We had a 60 litre tank for two years, and then last Christmas we bought a 180 litre Fluval tank. Since then we've bought many new fish as the aquarium looked so empty to start with.
One of our new purchases were what we were told were young Pearl Gourami. As they've grown they look less and less like what we thought Pearl Gourami should look like.
So what type of gourami are they? I've been trawling pictures on the web and I can't find anything that looks like them. The closest I could find were blue gourami and three spot gourami.

Here are some pictures, I'd appreciate any ideas as to what they are.

 

[KittyKat]

You are correct: it is a leucistic Trichogaster trichopterus of the "marble" colour morph.