Optimize page: content/english/net/basic-comparison/compare-excel-files-dotnet-groupdocs-comparison/_index.md - - Updated title, meta description, and front‑matter to include primary keyword and fresh date.

- Added Quick Answers section for AI‑friendly snippets.
- Integrated primary and secondary keywords naturally throughout headings and body.
- Expanded explanations, added “Why Compare…”, real‑world scenarios, and performance tips.
- Enhanced FAQ with additional Q&A and clarified answers.
- Inserted trust‑signal block with last‑updated date, tested version, and author.

Author: adil-aspose