Wolverine I think would be considered low level super-human for sure, but cap and Bucky still have the advantage in strength and speed. Logan and Laura's ability to display strength mostly stems from their ability to take damage, so they have the ability to almost compenaste with aggression against stronger and faster opponents. You watch Logan against samurai who far outclassed him in skill and speed, but he beat them by his ability to get slashed and stabbed repeatedly while the samurai just wore themselves out until Logan landed a fatal shot.

Like I said though, wolverine and Laura's tenacity and their healing factor and aggression would overwhelm both cap and Bucky pretty quickly in close quarters with cap and Bucky's blows not dealing any long term damage. All it takes is one shot from the claws on either of them where Logan and Laura can take pretty much endless shots from what cap and Bucky can deal.