If the customer still only has the included Report Manager, and they need anything additional, opt for the bundle. Once you add anything past the 1 Report Manager you can't then add the bundle, although perhaps that has changed.
@DougHiggs Your inquiry reminds me of the air force base scene from This Is Spinal Tap:
Lt. Hookstratten: Uh, I would like to get the playing on about 1900 hours, if that's satisfactory.
Derek: When would that be?
Lt. Hookstratten: I make it now... it's about 1830 hours.
Derek: So, that's what? Fifty hours?
David: Hundred and twenty hours?