HMS Hood was a controlled turret experiment

Did HMS Hood make the Royal Sovereign class less homogeneous?

Only in a limited sense; the Navy used a familiar class design to test turrets instead of open barbettes.

The question challenges the idea that the act produced a fully homogeneous battleship class because HMS Hood differed from her sisters. The difference is treated as a controlled experiment within the class. The Royal Navy kept a hull and general arrangement it understood while replacing the open barbette installation with turrets. This let the service compare a major armament feature without surrendering the logistical and operational benefits of a common design.