We have just watched the " live aid 35th anniversary show " on TV

got me thinking ( and arguing with the mrs ) who were the biggest act ( not at the time, overall over time ) behind Queen, it must have been U2, then i raised the question, who over all of time have been the biggest, Queen or U2, i thought it must be U2, they must have toured more ( sure they are now a big arena band not a stadium band ), U2 broke the US while queen didnt really manage it

So Queen or U2, which have been the biggest over time ? ? ?