Hi Kharon. We've run the Accel through a series of objective and subjective tests against a variety of competitive models and types of fins. The Accel outperforms most fins in terms of thrust, speed, maneuverability and efficiency. I've used the X3 for a variety of diving - local, travel, even some light freediving. It's a great all around fin - plenty of power and works well with a variety of kick styles. I find that there are no compromises with the smaller and lighter Accel - it's thrusty and fast when I need it to be, easy on the legs and ankles when cruising. Our guys in customer service asked me the same questions this morning - I've asked them to pass on your contact info, please feel free to contact me directly if you'd like to discuss it further.