Dual Antenna vs Single Antenna + IMU

Hello, right now i’m running a Dual F9P Setup on my Case Puma 200. On these tractors the Cabin suspension is really good, which also means it moves a lot. Does the Cabin movement affect the Dual Antennas a lot when they are mounted on top off the cabin, and would it therefore improve gps accuracy if a single antenna would be mounted on top of the hood / still on the Cabin but with a Imu fixed to the Chassis of the Tractor?

And overall, is dual antenna better than a single antenna with IMU, even if the Single Antenna is mounted on a spring suspended Cabin when the IMU is mounted to the Tractors chassis?

How are you guys handling this Problem, or isn’t it really a Problem?