They are not bitmap fonts, but they are rendered on screens using pixels. On a typical 96 dpi laptop screen, the pixels end up in the same place.
It's easy to examine precisely how the faces differ, or don't. In MATE or Gnome2, set one face as the default monospace font, and set the terminal emulator to use the the other face. In the terminal preferences page, rapidly flip the toggle that chooses between using the two, and watch which pixels stay the same, or bounce up and down predictably.
Plagiarism is not possible with typefaces. Any typeface may be based on any other, although it's courteous to acknowledge one's sources, and to name yours in a way that prevents confusion. (Otherwise we might call SCP "Inconsolata Squat".) It's possible that both are derived from a common source. Raph acknowledges debts to Consolas and Bitstream Vera, among others.
Posted Aug 29, 2013 11:33 UTC (Thu) by rsidd (subscriber, #2582)
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Can you point us uninitiated folks to the open-source Inconsolata project?
Cutups
Posted Aug 29, 2013 11:39 UTC (Thu) by rsidd (subscriber, #2582)
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Sorry my bad -- was confusing inconsolata with something else, and inconsolata is indeed open source -- but it is monospace and Source Sans isn't (the original blog post says the monospace ones are WIP) -- so I don't see your point. Nor do I see such a striking similarity in general.
Cutups
Posted Aug 30, 2013 17:56 UTC (Fri) by k8to (subscriber, #15413)
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From the article, there are two fonts from Adobe, one is Sans Source Pro, which is monospaced.
I'm too lazy to investigate the similarity under discussion.
Cutups
Posted Aug 29, 2013 13:46 UTC (Thu) by n8willis (editor, #43041)
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It's far simpler to just open up both fonts in the Google Fonts collection browser; in the "Compare" tab, the app will show the characters from both faces overlayed, so you can clearly see the differences.
Nate
Cutups
Posted Aug 29, 2013 19:14 UTC (Thu) by bvanheu (subscriber, #88814)
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to compare the Source Sans with the fixed width font would be silly.
I must admit this particular rendering makes them look quite different, with inconsolata being much thicker. I have no idea if they are being handled differently in some way.