Originally Posted by shadowk
OFFICE for X86 is not the same program as the one for ARM
they may look alike but its only the program skins
here's an article explaining some (don't know if it's really all or not) of the differences between RT and x86 office
I'm sure that by now some of you are probably wondering what exactly is missing from Office 2013 in Windows RT. The biggest missing feature is Macro support. Most of the angry letters that I received were because I failed to mention that Excel macros don't work in Windows RT.
Also missing is support for add-ins, forms and ActiveX controls. Additionally, Microsoft has neglected to include the ability to perform screen recordings in PowerPoint and OneNote. OneNote is also missing the ability to search audio and video recordings. Similarly, PowerPoint lacks the ability to play legacy media and flash videos. Finally, the Equation Editor is missing.
Although there are a number of features missing from the Windows RT version of Office 2013, most of the omissions probably won't affect all that many people. Of course if you do use Office macros or if you depend on any of the features that have been omitted then a Windows RT tablet probably isn't going to be the best choice for you. If you want the full Office 2013 feature set then you will have to use an X86 / X64 platform.
So whether or not includes 100% of every minute detail or not, it's still pretty much everything you could ask for on an ARM based tablet.