2 Button Dress Shirt Collar? Good, Bad, Ugly?

I’m purchasing a number of made to fit dress shirts and saw an option to have 2 buttons instead of 1 neck button on a wide spread shirt. While I’ve read Alan Flusser’s Style & The Man, I haven’t seen anything referencing this.

How would this affect the presentation of the shirt? Would it make it more formal, casual, over the top, lacking style etc?

Here are 3 pictures that illustrate it: