I will use the number listed as "WORLDWIDE" (under "GROSSES") for both. I will check BoxOfficeMojo 

after the release of "Dune: Part Two", i.e. May 1st, and use the listed gross for both movies as of that date. [1] 

(currently) lists a worldwide (WW) gross of $167,635,712. If you multiply that by 4, you get $670.5M. This would count as larger than the WW gross of 

 ($402,027,830), but less than the WW gross of  

If any aspects of resolution are unclear, please ask and I will clarify.

[1]. Note that this may not fully include all gross that occurs before May 1st (as BoxOfficeMojo may not have updated much). I doubt that this will change the result, but I like to set a concrete end date for my box office markets so they don't drag on beyond the point of being interesting. Keep that in mind.