19mm Panoptic vrs. 24mm Panoptic edge of field.

Hello all, I would like to know from anyone who owns both these eyepieces if you can see a difference in the edge of field sharpness between the two. After recently purchasing the 24mm, the edge of field sharpness in my approx. 3 year old 19mm compared to the 24mm seems almost disapointing (though still a lot better than some other wide fields I've looked through.)The 24mm shows pin point stars right to the edge, while the 19mm begins to show curvature of field about 80% of the way out from the center of field. The scope I'm using for testing is my Genesis SDF refractor which has the built in field flatening lens. Shouldn't these two eyepieces have the same correction or has Al improved the design with the newer 24mm. Thanks to anyone in advance who has compared these two and can comment. Thanks, Dave