Your product code is 059N151, so according to this variant table your firmware is 'legacy 454'. If you try to flash legacy 005 you will simply get 'Downgrade disallowed' error. In a nutshell, you need at least one file to flash your N9, and in your case this file is called DFL61_HARMATTAN_40.2012.21-3.454.6_PR_LEGACY_454_ARM_RM-696_PRD_signed.bin. It is the firmware image itself. However, if you also want to clear the 'user partition' and to get the default applications and ringtones/wallpapers, you should also flash DFL61_HARMATTAN_40.2012.21-3.454.5_EMMC_454.bin. This is the so-called 'content file'. So, roughly speaking, flashing not your phone's 'native' content file will only give you applications for another region. Usually it does not cause any troubles. You can get more info in this thread.