Think you'll find that these are cgi or artist's impressions rather than photo's? some of the text on that page refers to them as "sketches"

The images show 3 different aircraft. The first with air intakes on the top, seems to be a "sovietized" YF-23 Black Widow II. The second with forward-swept wings is a sleeker Sukhoi S-47 Berkut. The third with the airbrake up and intakes under the wing looks like a sovietized F-22 Raptor. The final one is closest to the actual T-50 airframe as currently proposed.

these aircraft are not stealthy...they are going to have a big IR signature.

Think about it when you look at these photos.

Thanks,
Orangetom