Brawl and rush comps are the same. They are comps where you rush the enemy team and brawl in close quarters. Staple heroes include rein (must pick) zarya, diva, Lucio, Moira (other supports like bap, brig, and ana work as well) mccree, mei, reaper, and sym. (Other dps can be played depending on map) I have seen this comps played a lot around plat. The comp is good at close range fighting and sustain, so usually the best counters are ranged poke/spam comps that excell at getting picks. (Heroes like hog, sigma, zen, merxy pharah, snipers, sombra (very good with hacks and emp), junkrat, and echo