They tweaked the marketing language, but the frames are the same. The sprint version just does not include the pursuit bars, and it's the same frame the Canadians and Danes are riding. Also, Argon isn't producing any more track frames until after the Olympics. It's unclear whether that version of the Electron Pro will still be available after this year. Last I heard, there were only a couple frames left for purchase - and none in the "sprint" version.
And if you think about it, there is no benefit or rationale to building two different versions of the same frame with different layups. The Electron Pro is a very low seller. If they produce and sell 1000 frames a year, I'd be surprised. So, I cannot see them justifying two different carbon layups for so few frames.
Also, I have the frame.