I wasn’t saying the show implies they leave at the same velocity, rather that it is suggested, both explicitly and implicitly, that the victim is ejected at a higher speed than the rescuer can impart themselves by jumping.
The meaning of my observation is that, even if they left the ship at the same speed, the rescuer wouldn’t have been able to close the gap - but she doesn’t.
The victim is thrown out of the ship by a strong collision from a punctured canister, and that is before the pilot tells them to ‘brace for impact’, to which they respond by applying their open palms on the ship’s surfaces, an action underlined by a ‘clunk’ sound effect that implies the gloves can exert a magnetic force like magboots, which are realistically supposed to be engaged (there is no other safety retention system in place).
There is a shot framed from inside the ship which shows the victim getting rapidly smaller and smaller as if gaining distance rapidly. Then wide shots show that indeed she is quite far from the spaceship.
Moreover, the rescuer doesn’t immediately jump after her, but rather takes some time to get to the hatch, and then secure herself with the space winch, so in the intervening time, the distance between the two has only increased.
The only way I figure the sequence could work in the way it is depicted, is if, for whatever reason, the victim was losing momentum: this seems confirmed to me by a shot in which the rescuer extends her hand to stop and seems to be slowly decelerating and being on the brink of missing the catch.
However, while the rescuer is attached to the winch, which might indeed be affected by some attrition that would explain her progressively losing speed, I can think of no reason while the victim would also slow down, as they are in open space and there is no atmosphere, thick or thin, to provide any deceleration.
BTW the canister hits the victim quite violently and near the upper back and head; with the strength of the collision being large enough to overcome the resistance of the mag boots and gloves, and impart a significant speed, both the suit being damaged, and the person being injured, would appear as realistic consequences of the incident.
I believe the sequence was designed mainly as spectacle, and can be thought as the space equivalent of someone getting thrown off a ship into the sea, and then be saved by the skin of their teeth, so it’s probably not super productive for me to keep analyzing minute details.
Anyway, since I’m finally out of Expanse episodes, and for who knows how long, I’ve moved on to Upload, and have been enjoying it so far.