Did China Get Plans for Our Semi-Secret F-22 Raptor And Copy It? See the Alleged Pictures

Last week, the blog China Defense posted two photos, nearly identical, with only one line of text: "Just in case you might get confused, only one bird below is the J-20."

Gizmodo magnifies the pictures and puts them side-by-side for a better comparison:

The J-20 stealth fighter is the creation of the Chengdu Aircraft Industry Group for the People's Liberation Army in China. About a year and a half ago, the People's Liberation Army conducted its first tests of the aircraft, which is expected to be fully operational sometime between 2017 and 2019.

(Related: See the new pictures of China's 'Mighty Dragon' J-20 stealth fighter)

If only one is a J-20, can you guess the other? According to Gizmodo and others, it is an F-22 Raptor. The two are eerily similar, no? The technology and design of the aircraft by Lockheed Martin, Gizmodo notes, is still largely secret. If that's the case, what do the similarities between these two photos mean?

(Related: Air Force pilots granted whistleblower status after refusing to fly the potentially dangerous F-22s -- but are they being punished?)

Gizmodo speculates:

Looking at the comparison, it seems like they may have been some leaks. In fact, this comparison image is screaming espionage and reverse engineering with a 20,000-watt speaker right on Uncle Sam's face. A 20,000-watt speaker made in China.

Defense Tech makes the same assumption. It also points out that this is the first time a picture has been shown of the J-20's holographic HUD at this proximity.

Here's a clip allegedly showing the J-20's first test flight back in January 2011:

This Lockheed Martin video from Dec. 2011 describes more about the F-22 Raptor and shows some footage of it in flight:

What are your thoughts? Has the J-20 stolen some design elements from the F-22?