Currently, Map Suite Window Phone Edition only supports on Windows 8 X64, this is because Map Suite WP Edition is following the Windows Phone SDK 8.0 and the WP SDK only supports on window 8 based on my investigation. microsoft.com/en-us/down...x?id=35471
I didn't find any information on Wp SDK for windows RT, but if they share the same SDK with Window 8 on window phone, then I think the Map Suite Window Phone Edition should support it and the links like QuickStart should be the same. I guess I might need more time to search the Wp SDK for windows RT.
Let us know if any questions.