Monsters is such a great ride AND a people-eating crowd pleaser that I’d say absolutely. Also, the motion-sickness factor of FJ is practically a complete non-issue on Monsters, making it do-able and re-rideable for more guests.
Just as DL uses the same ride systems on multiple attractions, I think USH guests wouldn’t object to 2 arm-based dark rides because of how different the two experiences are, despite Studios having fewer attractions, making the similar hardware more apparent. I think the main reaction of USH guests to Monsters be “That was fantastic, and I didn’t get motion sick!”