Aqua, think about the blade length of the Hideaway, the penetration depth. I would think it doesn't matter if you get the straight or the claw. They are too similar, too short to matter as far as digging in to a vital body part. The most dangerous action would be to slash the neck or some similarly vulnerable area for blood vessels near the surface. For that kind of work, even the curvy would get the job done.
But straight and claw would both do stabbing and slashing to a very similar extent, because the short length, very positive grip, and extremely sharp edge would overwhelm the slightly different mechanics of edge geometry. The hawksbill gets its peculiar effect by sweeping into material as you pull, but this mini hawksbill will have cut through its small arc of attack before this effect matters.
It becomes a matter of aesthetics -- which feels right to you, how you move your hand in an attack or a defense. I think I would reflexively throw a punch, so the straight would seem to be in line with that.