You will feel more mass between your hands with the #2.
#2's are available stateside that are specially finished, sold by dealers as their in-house special model.

4's, with model 53 wood upgrades can be more dynamic, but a little plain.

It truly is a "buy the gun..." Situation.
Some#2's can be stunners.

The #4 I've used was an extension of my left hand. Very evenly balanced.

gold plated lock parts don't do anything for me.

Out there doing it best I can.