Unluckily we don't have a source for worldwide sales but probably RITD outsold PF ww too
EDIT: Counting certifications on Wiki + known sales PF is at 10m+ while RITD is at 10,5m+ so I can't really which one has sold more so far because on there are missing a lot of certification plus some certifications needs to be upgraded
Let's not forget digital/single sales are massive compared to 2009, and that RITD a massive track from now is being compared to PF is an acheivement
Thank you 
at the ***** on your fave one.
....and aww you know my taste 
at those LM pictures