Originally Posted by Spider-Vader
You obviously don't understand Cap's character then. He's THE leader, no one could even imagine to rally the troops like Cap can. Cap also has a spirit unlike any other, there's a reason why he was the last one standing against Thanos.
Cap also carries a big honkin' Frisbee.
And yeah, in addition to Cap being (most often, by a large margin) the de facto leader of the Avengers, his skill set and fighting style are very different from BP's. Cap is a rugged two-fisted pulp hero whose basic strategy usually boils down to: bash in the front door and come in throwing punches. T'challa, conversely, is a Batman-type who relies more on stealth and strategy.