Allen>>>>>>>>Herbert
There really is no comparison between the two imo.
Allen is the better athlete, has better escapability, and a better pocket presence.
Allen has the stronger arm of the two.
Allen can throw on the run better than Herbert.
Allen can take over a game. I have NEVER seen Herbert take over a game.
Allen is a leader of men and has shown this ability to make everyone else around him better all the time. Never once have I seen this with Herbert.
Josh Allen does things that only Josh Allen can do. Some of the greatest throws I have ever seen. Hurdling defenders. Stiff-arming defensive ends to the ground, laying them flat. Herbert has zero of this in his game.
There really is no comparison between the two, outside of their physical stature.