When comparing Google Roboto vs Bitstream DejaVu, the Slant community recommends Google Roboto for most people. In the question“What are the best fonts to set as the default for web browsers?” Google Roboto is ranked 2nd while Bitstream DejaVu is ranked 7th. The most important reason people chose Google Roboto is:
Sans serif, bold, italic, mono, slab (serif) - so you can add all kind of styling from good readable long texts (serif), over headlines (sans serif) to source code (mono).
Specs
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Pros
Pro Available in different styles
Sans serif, bold, italic, mono, slab (serif) - so you can add all kind of styling from good readable long texts (serif), over headlines (sans serif) to source code (mono).
Pro Can be referenced from google servers
You can link to the fonts on the google servers. Since it is popular, people have it cached already most likely, speeding up your website load time.
Pro Forked from Bitstream's Vera family of typefaces
The Vera fonts changed the way the game was played regarding typeface display on digital displays with full hinting for every glyph, allowing the compositor to tweak any character to render well for the specific pixel pattern it had to use for the position it was placed on the screen. It's a pleasant and high-quality foundation for any typographic endeavour.
Pro DejaVu Sans is an alternative to Microsoft Verdana
Pro Oodles and oodles of mathematical symbols
LaTeX wouldn't be the juggernaut it is currently in academic circles if it weren't for the DejaVu fonts hitting their stride in the same era of computing. So long as there's a bottle of liquor handy and a way to browse the mathematical symbols in the Vera fonts, you'll never be bored and lonely again.
Pro Condensed versions of Sans and Serif
These were easily overlooked until we all started spending half our lives looking at screens that literally fit in the palms of our hands. They're available for all the font weights of both typefaces and the oblique styles as well.