GroupDocs.Comparison provides an ability to detect differences between source and target files for changes at paragraphs, words and characters levels. Can identify styling and formatting changes - like bold, italic, underlines, strike-troughs, font types, etc.
Apply/Reject changes between documents
Every particular difference between compared document can be applied or rejected and the exported to a final document.
Document information extraction
GroupDocs.Comparison allows to obtain basic information about source document - file type, size, pages count etc.
This may be quite useful for generating previews of compared documents.
Comparison summary report
Once comparison process is complete, you can save a differences summary report which lists all changes found between compared documents.