Celery seed extract would be better for an immediate result. Hawthorn typically needs to be taken regularly for extended time to see its results. Thats why people preload it. Celery seed will provide more immediate results, or at least act quicker than hawthorn.
If you are using one of the all in one cycle supports like AI cycle support or CEL Cycle assist you should be good though as they have both hawthorn and celery seed.