No - it seems to have been worse than either, and as bad as both: Bombing of Tokyo (10 March 1945) - Wikipedia Of course, there's always the possibility that the figures have been Dresdened a little bit to suit a narrative.
"Against Japan, the M69 was carried in the bomb bay of the Boeing B-29 Superfortress, with a typical load containing 40 cluster bombs, a total of 1520 M69 bomblets" M69 incendiary - Wikipedia
