It appears that you are comparing the weights of two different Kawasaki sportbike models, the ZX-10R and the ZX-6R. According to the numbers you provided, the ZX-10R has a weight of 452.2 pounds (approximately) and the ZX-6R has a weight of 430 pounds.
Based on these figures, there is indeed a difference of approximately 24.2 pounds between the two models, with the ZX-10R being slightly heavier. It's worth noting that the specific weight of a motorcycle can vary depending on factors such as the model year, optional equipment, and individual configurations.
The fact that you can flat foot on both bikes suggests that you are comfortable with the seat heights of both models. While the weight difference can be noticeable, it may not significantly impact your ability to handle or ride the motorcycles.
Remember that the overall riding experience is influenced by various factors beyond weight alone, such as power, handling characteristics, riding position, and personal preference. It's a good idea to test ride both models if possible to determine which one feels more comfortable and suits your riding style.