When comparing Spectre vs Cirrus, the Slant community recommends Spectre for most people. In the question“What is the best CSS framework?” Spectre is ranked 9th while Cirrus is ranked 23rd.
Ranked in these QuestionsQuestion Ranking
Works well on any device.
Contains only the basics, no extra fluff.
Pro Open source
Spectre is used through Github, and is open source.
Very clean design compared to bootstrap.
Pro Mobile ready
Spectre can be used to create mobile websites easily. With all the regular built in elements (buttons, menus, grids etc).
Pro Open Source
Open source and quite actively maintained on Github.
Pro Mobile Responsive
Extremely responsive and supports many smaller screens.
Much smaller than Bootstrap with just as much flexibility.
Pro CSS Only
No additional JS/jQuery required to use.
Pro Supports Flexbox and CSS Grid
Supports both Flexbox and CSS grid making it a great modern choice for designing web apps.