Maybe, but the leverage is in the wrong direction:
DLR pulled almost 26M in 2022 (DLR 16.9M, DCA 9M). USH was 8.4M, or only about 1/3. There also isn't an eyeball-obvious discontinuous drop at DLR that coincides with the USH opening. There's also the fact that they are on the opposite ends of the world, traffic-wise. From my son's perspective in Westwood, Anaheim may as well be in Arizona.
SFMM was sharply up, but those numbers are odd so I did not include them the first go-round. There's no good reason why Magic Mountain and Knotts would be moving in opposite directions. Their new single-rail is cool, but it is not
that cool.
SWSD was down in May, but that's partly due to their new coaster in June.