>Obviously it is.. but in what ways? Can you provide any links or documentation on the changes or improvements from VFP6 to 9? The stuff I usually find is from VFP8 to 9.

See
- http://fox.wikis.com/wc.dll?Wiki~VisualFoxProVersionFeatureConcordance
- VFP7 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fox7help/html/newWhats_New_in_Visual_FoxPro60.asp
- VFP8 http://msdn.microsoft.com/vfoxpro/using/documentation/default.aspx?pull=/library/en-us/dv_foxhelp/html/fooriwhatsnewinvisualfoxpro80.asp
- VFP9 http://msdn.microsoft.com/library/en-us/dv_foxhelp9/html/d18b257b-4e8c-4bd7-bc46-682526474e68.asp