An anti sway bar is just a torsion spring. They mount to the chassis at two points on different sides of the car, and have bends at each side to produce lever arms. The ends of each lever arm connect through end links to a point on the suspension, control arms usually. By design, any anti sway bar will not impact the ride on any surface that's even between the left and right sides. It will impact the ride somewhat over uneven surfaces by effectively increasing the spring rate by twisting the anti sway (torsion) bar as each side of the suspension is at a different level. The much more noticeable impact will be the reduced body roll using the same torsion effect when cornering. Weight transfers away from the inside suspension towards the outside during cornering, causing the inside suspension to lift, or lengthen, and the outside suspension to squat, or shorten. The anti sway bar resists that change by twisting the anti sway (torsion) bar as one arm tries to move up while the other side tries to move down.
Those of you old enough to remember Ralph Nader and the Chevrolet Corvair (yes, I'm old) understand why all vehicle manufacturers engineer understeer into their suspensions. Although with the prevalence of anti lock braking systems they no longer need to. Prior to anti lock brakes being widely available, manufacturers wanted to ensure that in an emergency when a driver panic braked, every vehicle had a decent amount of understeer so the car would continue in a straight line with the wheels locked up. With oversteer, that situation would cause the car to fishtail and potentially head in a direction the driver didn't intend. That opens the manufacturer up to litigation from consumers involved in accidents. That being said, front wheel drive cars tend to understeer an excessive amount due to their inherent weight distribution issues, as well as the steering wheels also being the drive wheels (power understeer).
Stock end links should be fine with just about any aftermarket spring/anti sway bar combination. Adjustable length end links are useful/necessary with adjustable height coilovers to prevent preload on the anti sway bar due to suspension heights being adjusted individually at each corner (i.e. corner weighting).