The devil is in the details.
- "Reset BCD Configuration" only affects the BOOT/BCD file and resets it to a blank state, plus writes the boot code to the MBR.
- "Install Windows Vista/7 Bootloader" only writes to the MBR (as the text says) and does not touch any files or configurations. Think of it as flipping a switch to choose which bootloader is used. No more, no less.
- "Re-Create/Repair Boot Files" resets the BCD and MBR (as #1) but also re-creates any bootloader files (BOOTMGR, locales, etc).