When comparing Calligra vs Abiword + Gnumeric, the Slant community recommends Calligra for most people. In the question“What are the best office suites for Linux?” Calligra is ranked 5th while Abiword + Gnumeric is ranked 7th.
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Pro Huge list of efficient and capable office components
Calligra consists of 9 tools. In addition to word-processing, spreadsheet and presentation software, it includes tools for project management, sketching/painting, database management, vector graphics, diagramming and brainstorming.
Pro Made for KDE
Designed in Qt for KDE plasma (but will also work in other DEs), hence the appearance is consistent with it.
Pro Calligra offers cutting edge applications for artists to work on 2D drawings and illustrations
Calligra includes Krita, a sketching and painting application, and Karbon, a vector drawing application. Both offer end-to-end solutions. Krita is also available as a standalone program.
Pro Unified design language
Both AbiWord & Gnumeric are designed with low resource consumption in mind. As such they are great applications for older computers.
Over 30 languages are supported.
Pro Free and open-source
Pro Great import/export features
Pro Collaborative editing
Abiword is able to edit online collaborative documents.
Very bloated as it requires way too many dependencies to install. This is especially prominent in non-KDE desktops which may require over 100 dependencies to install.
Con Slow development
Development is slower and less active than competition.
Con Subpar compatibility
Microsoft office proprietary formats are not always accurately rendered
Con AbiWord has a dated aesthetic
The interface hasn't had a facelift since it's inception in 1998.
Con Default format is only readable with Gnumeric
Gnumeric is able to read/write a lot of file formats including ODS, XLS, XLSX, but it's default .gnumeric format is only readable with Gnumeric.