Further complication is that the CS2.7s were built in Lexington with traditional components. Early 3.7s were also, but then 3.7 production was moved to China with differences in all components. So, the 2.7 might get a leg up due to its home-base implementation.
Another thought is that the CS3.7 baffle is aluminum with far greater stiffness than the 2.7's MDF, which absorbs some detail.