[masraum]

Originally Posted by sc_rufctr

OXCART on the right. I can't tell the difference.



https://www.cia.gov/news-information/featured-story-archive/2015-featured-story-archive/oxcart-vs-blackbird.html

Look at the nose of the two planes. The narrow nose (right) is the earlier version. They increased the width of the fuselage via the wide/flat area along the length, I think the give more lift/stability.

Hah, I didn't notice the link in your post, and stumbled upon the same link. I was going to post it before I realized. Farther down that webpage is a link to an image showing a visual comparison between the two planes' silhouettes. Also, I think the plane on the left has a back seat (with window) and the plane on the right doesn't.