I’ve noticed that the isometric shape effectively makes the racquet behave 1/4” longer. That is, the sweet spot is about 1/4” further from the hand when compared to oval frames of equal length and equal head size. This is because the flattened tip cuts off about 1/4” of the top of the oval, and also 1/4” from the bottom of hoop, moving the center of hoop 1/4” further from hand.
This length effect needs to be taken into account when comparing frames to get apples-to-apples comps for feel and performance.