Falcon is a better, more maneuverable flyer, way more experienced between the Military and his hero activities, and guns/accuracy will take out goblin bombs and then GG.Jr. himself.
All Falcon has to do is fight at range and that negates any physical advantages GG.Jr. brings to the fight. You can see by this clip…
…the goblin bombs can be shot out of the air (as Spidey’s shown hitting them w. webbing), and if Spidey’d used a gun instead of web balls at the beginning, the fight would’ve been over as he tagged GG.Jr. several times.
GG.Jr. enjoyed a flight advantage, the advantage of Spidey not wanting to hurt a friend, and did best when fighting Spidey up close.