Edt is right.
More "C" shaped kites generate more power when turned and looped, in general.
The cost is, they go lousy upwind, has more drag and weight, compared to more "flat" kites.
If we look away from above - there is another VERY important parameter, namely how fast/powerful it flies.
Grunty kite (deep profiles) will in general have good power at low speeds, but usually not generate much power when "worked".
Whereas faster (flying not turning) kites, higher AR, will be able to REALLY give you a kick in the ass when going fast or worked correctly.
The most extreme example of this is a race foil kite.
It turns really bad and slow, and can pivot turn too without any power.
BUT, if worked up and down the right way, or looped at a wider arc, or simply going FAST, they will generate a HUGE amount of power, so much you wont believe it !!!
The same goes for LEIs.
If they got a faster profile, no matter if C shaped or more flat, they will generate more power when flown faster, compared to grunty profiles that dont accelerate nor extend their power in the same way.
Grunty kites are easy to ride, and pulls when going slow.
Faster kites require more finesse and technique, but can give you insane powerspikes which I assume is what you ask for in this thread.
But there is a price, not the same grunt.
The upside is, they got a WAY bigger windrange than the grunty kites - and unfortunately you can not have both, it is either or or something in between